125311657 has 4 divisors (see below), whose sum is σ = 126821520. Its totient is φ = 123801796.

The previous prime is 125311651. The next prime is 125311661. The reversal of 125311657 is 756113521.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125311657 is a prime.

It is a super-2 number, since 2×125311657² = 31406022760171298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125311651) 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, 754807 + ... + 754972.

It is an arithmetic number, because the mean of its divisors is an integer number (31705380).

Almost surely, 2^125311657 is an apocalyptic number.

It is an amenable number.

125311657 is a deficient number, since it is larger than the sum of its proper divisors (1509863).

125311657 is an equidigital number, since it uses as much as digits as its factorization.

125311657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1509862.

The product of its digits is 6300, while the sum is 31.

The square root of 125311657 is about 11194.2689354866. The cubic root of 125311657 is about 500.4151977928.

The spelling of 125311657 in words is "one hundred twenty-five million, three hundred eleven thousand, six hundred fifty-seven".