157942865 has 16 divisors (see below), whose sum is σ = 194939136. Its totient is φ = 122774400.

The previous prime is 157942859. The next prime is 157942867. The reversal of 157942865 is 568249751.

It is a happy number.

It is not a de Polignac number, because 157942865 - 2⁴ = 157942849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157942867) 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, 54134 + ... + 56976.

It is an arithmetic number, because the mean of its divisors is an integer number (12183696).

Almost surely, 2^157942865 is an apocalyptic number.

It is an amenable number.

157942865 is a deficient number, since it is larger than the sum of its proper divisors (36996271).

157942865 is a wasteful number, since it uses less digits than its factorization.

157942865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3160.

The product of its digits is 604800, while the sum is 47.

The square root of 157942865 is about 12567.5321762071. The cubic root of 157942865 is about 540.5468454410.

It can be divided in two parts, 1579 and 42865, that added together give a palindrome (44444).

The spelling of 157942865 in words is "one hundred fifty-seven million, nine hundred forty-two thousand, eight hundred sixty-five".