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115420242 = 23717237257
BaseRepresentation
bin1101110000100…
…10110001010010
322001011221210210
412320102301102
5214021421432
615241504550
72601025110
oct670226122
9261157723
10115420242
115a173a33
12327a2156
131abb2502
1411486ab0
15a1ed8cc
hex6e12c52

115420242 has 96 divisors (see below), whose sum is σ = 288943488. Its totient is φ = 30081024.

The previous prime is 115420241. The next prime is 115420243. The reversal of 115420242 is 242024511.

It is an interprime number because it is at equal distance from previous prime (115420241) and next prime (115420243).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (115420241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 448978 + ... + 449234.

It is an arithmetic number, because the mean of its divisors is an integer number (3009828).

Almost surely, 2115420242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115420242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144471744).

115420242 is an abundant number, since it is smaller than the sum of its proper divisors (173523246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115420242 is a wasteful number, since it uses less digits than its factorization.

115420242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 115420242 is about 10743.3813113005. The cubic root of 115420242 is about 486.8860447321.

Adding to 115420242 its reverse (242024511), we get a palindrome (357444753).

The spelling of 115420242 in words is "one hundred fifteen million, four hundred twenty thousand, two hundred forty-two".

Divisors: 1 2 3 6 7 14 17 21 34 37 42 51 74 102 111 119 222 238 257 259 289 357 514 518 578 629 714 771 777 867 1258 1542 1554 1734 1799 1887 2023 3598 3774 4046 4369 4403 5397 6069 8738 8806 9509 10693 10794 12138 13107 13209 19018 21386 26214 26418 28527 30583 32079 57054 61166 64158 66563 74273 74851 91749 133126 148546 149702 161653 183498 199689 222819 224553 323306 399378 445638 449106 484959 519911 969918 1039822 1131571 1559733 2263142 2748101 3119466 3394713 5496202 6789426 8244303 16488606 19236707 38473414 57710121 115420242