125402531 has 2 divisors, whose sum is σ = 125402532. Its totient is φ = 125402530.

The previous prime is 125402521. The next prime is 125402549. The reversal of 125402531 is 135204521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125402531 - 2¹⁸ = 125140387 is a prime.

It is a super-2 number, since 2×125402531² = 31451589562411922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 125402497 and 125402506.

It is not a weakly prime, because it can be changed into another prime (125402521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62701265 + 62701266.

It is an arithmetic number, because the mean of its divisors is an integer number (62701266).

Almost surely, 2^125402531 is an apocalyptic number.

125402531 is a deficient number, since it is larger than the sum of its proper divisors (1).

125402531 is an equidigital number, since it uses as much as digits as its factorization.

125402531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 125402531 is about 11198.3271518562. The cubic root of 125402531 is about 500.5361329175.

The spelling of 125402531 in words is "one hundred twenty-five million, four hundred two thousand, five hundred thirty-one".