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142120151 = 2331474241
BaseRepresentation
bin10000111100010…
…01010011010111
3100220102110012022
420132021103113
5242340321101
622034043355
73344000315
oct1036112327
9326373168
10142120151
117324aa78
123b71955b
13235a0384
1414c370b5
15c724a1b
hex87894d7

142120151 has 16 divisors (see below), whose sum is σ = 156377088. Its totient is φ = 128726400.

The previous prime is 142120141. The next prime is 142120169. The reversal of 142120151 is 151021241.

142120151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2k-142120151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142120141) 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, 31391 + ... + 35631.

It is an arithmetic number, because the mean of its divisors is an integer number (9773568).

Almost surely, 2142120151 is an apocalyptic number.

142120151 is a deficient number, since it is larger than the sum of its proper divisors (14256937).

142120151 is a wasteful number, since it uses less digits than its factorization.

142120151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4342.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 142120151 is about 11921.4156458031. The cubic root of 142120151 is about 521.8574487315.

Adding to 142120151 its reverse (151021241), we get a palindrome (293141392).

The spelling of 142120151 in words is "one hundred forty-two million, one hundred twenty thousand, one hundred fifty-one".

Divisors: 1 23 31 47 713 1081 1457 4241 33511 97543 131471 199327 3023833 4584521 6179137 142120151