125545657 has 2 divisors, whose sum is σ = 125545658. Its totient is φ = 125545656.

The previous prime is 125545613. The next prime is 125545741. The reversal of 125545657 is 756545521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124300201 + 1245456 = 11149^2 + 1116^2 .

It is a cyclic number.

It is not a de Polignac number, because 125545657 - 2⁷ = 125545529 is a prime.

It is not a weakly prime, because it can be changed into another prime (125545957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62772828 + 62772829.

It is an arithmetic number, because the mean of its divisors is an integer number (62772829).

Almost surely, 2^125545657 is an apocalyptic number.

It is an amenable number.

125545657 is a deficient number, since it is larger than the sum of its proper divisors (1).

125545657 is an equidigital number, since it uses as much as digits as its factorization.

125545657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 210000, while the sum is 40.

The square root of 125545657 is about 11204.7158375391. The cubic root of 125545657 is about 500.7264865899.

The spelling of 125545657 in words is "one hundred twenty-five million, five hundred forty-five thousand, six hundred fifty-seven".