125157909 has 8 divisors (see below), whose sum is σ = 169613152. Its totient is φ = 82070640.

The previous prime is 125157869. The next prime is 125157911. The reversal of 125157909 is 909751521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125157909 - 2¹¹ = 125155861 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 (125157919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341779 + ... + 342144.

It is an arithmetic number, because the mean of its divisors is an integer number (21201644).

Almost surely, 2^125157909 is an apocalyptic number.

It is an amenable number.

125157909 is a deficient number, since it is larger than the sum of its proper divisors (44455243).

125157909 is an equidigital number, since it uses as much as digits as its factorization.

125157909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683987.

The product of its (nonzero) digits is 28350, while the sum is 39.

The square root of 125157909 is about 11187.3995637950. The cubic root of 125157909 is about 500.2104567368.

The spelling of 125157909 in words is "one hundred twenty-five million, one hundred fifty-seven thousand, nine hundred nine".