125646457 has 2 divisors, whose sum is σ = 125646458. Its totient is φ = 125646456.

The previous prime is 125646407. The next prime is 125646481. The reversal of 125646457 is 754646521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110754576 + 14891881 = 10524^2 + 3859^2 .

It is a cyclic number.

It is not a de Polignac number, because 125646457 - 2¹⁵ = 125613689 is a prime.

It is not a weakly prime, because it can be changed into another prime (125646407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62823228 + 62823229.

It is an arithmetic number, because the mean of its divisors is an integer number (62823229).

Almost surely, 2^125646457 is an apocalyptic number.

It is an amenable number.

125646457 is a deficient number, since it is larger than the sum of its proper divisors (1).

125646457 is an equidigital number, since it uses as much as digits as its factorization.

125646457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 40.

The square root of 125646457 is about 11209.2130410658. The cubic root of 125646457 is about 500.8604610309.

It can be divided in two parts, 1256464 and 57, that added together give a palindrome (1256521).

The spelling of 125646457 in words is "one hundred twenty-five million, six hundred forty-six thousand, four hundred fifty-seven".