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61013142 = 2331959467
BaseRepresentation
bin1110100010111…
…1110010010110
311020210210022000
43220233302112
5111104410032
610015420130
71340413611
oct350576226
9136723260
1061013142
1131493093
1218524646
13c843168
148163178
155552e7c
hex3a2fc96

61013142 has 32 divisors (see below), whose sum is σ = 142723200. Its totient is φ = 19266984.

The previous prime is 61013137. The next prime is 61013143. The reversal of 61013142 is 24131016.

It is a happy number.

61013142 is a `hidden beast` number, since 610 + 13 + 1 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61013143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28708 + ... + 30759.

It is an arithmetic number, because the mean of its divisors is an integer number (4460100).

Almost surely, 261013142 is an apocalyptic number.

61013142 is an abundant number, since it is smaller than the sum of its proper divisors (81710058).

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

61013142 is a wasteful number, since it uses less digits than its factorization.

61013142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59497 (or 59491 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 61013142 is about 7811.0909609350. The cubic root of 61013142 is about 393.6779859229.

Adding to 61013142 its reverse (24131016), we get a palindrome (85144158).

The spelling of 61013142 in words is "sixty-one million, thirteen thousand, one hundred forty-two".

Divisors: 1 2 3 6 9 18 19 27 38 54 57 114 171 342 513 1026 59467 118934 178401 356802 535203 1070406 1129873 1605609 2259746 3211218 3389619 6779238 10168857 20337714 30506571 61013142