125318931 has 4 divisors (see below), whose sum is σ = 167091912. Its totient is φ = 83545952.

The previous prime is 125318911. The next prime is 125318981. The reversal of 125318931 is 139813521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 139813521 = 3 ⋅46604507.

It is a cyclic number.

It is not a de Polignac number, because 125318931 - 2⁶ = 125318867 is a prime.

It is a super-2 number, since 2×125318931² = 31409668933965522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 125318892 and 125318901.

It is not an unprimeable number, because it can be changed into a prime (125318911) 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, 20886486 + ... + 20886491.

It is an arithmetic number, because the mean of its divisors is an integer number (41772978).

Almost surely, 2^125318931 is an apocalyptic number.

125318931 is a deficient number, since it is larger than the sum of its proper divisors (41772981).

125318931 is an equidigital number, since it uses as much as digits as its factorization.

125318931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41772980.

The product of its digits is 6480, while the sum is 33.

The square root of 125318931 is about 11194.5938291659. The cubic root of 125318931 is about 500.4248801847.

The spelling of 125318931 in words is "one hundred twenty-five million, three hundred eighteen thousand, nine hundred thirty-one".