157239129 has 4 divisors (see below), whose sum is σ = 209652176. Its totient is φ = 104826084.

The previous prime is 157239127. The next prime is 157239133. The reversal of 157239129 is 921932751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 157239129 - 2¹ = 157239127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157239127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26206519 + ... + 26206524.

It is an arithmetic number, because the mean of its divisors is an integer number (52413044).

Almost surely, 2^157239129 is an apocalyptic number.

It is an amenable number.

157239129 is a deficient number, since it is larger than the sum of its proper divisors (52413047).

157239129 is an equidigital number, since it uses as much as digits as its factorization.

157239129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52413046.

The product of its digits is 34020, while the sum is 39.

The square root of 157239129 is about 12539.5027413371. The cubic root of 157239129 is about 539.7428233545.

The spelling of 157239129 in words is "one hundred fifty-seven million, two hundred thirty-nine thousand, one hundred twenty-nine".