125645857 has 2 divisors, whose sum is σ = 125645858. Its totient is φ = 125645856.

The previous prime is 125645813. The next prime is 125645873. The reversal of 125645857 is 758546521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125081856 + 564001 = 11184^2 + 751^2 .

It is a cyclic number.

It is not a de Polignac number, because 125645857 - 2¹⁹ = 125121569 is a prime.

It is not a weakly prime, because it can be changed into another prime (125645057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62822928 + 62822929.

It is an arithmetic number, because the mean of its divisors is an integer number (62822929).

Almost surely, 2^125645857 is an apocalyptic number.

It is an amenable number.

125645857 is a deficient number, since it is larger than the sum of its proper divisors (1).

125645857 is an equidigital number, since it uses as much as digits as its factorization.

125645857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336000, while the sum is 43.

The square root of 125645857 is about 11209.1862773352. The cubic root of 125645857 is about 500.8596637760.

The spelling of 125645857 in words is "one hundred twenty-five million, six hundred forty-five thousand, eight hundred fifty-seven".