125420057 has 6 divisors (see below), whose sum is σ = 145896858. Its totient is φ = 107502864.

The previous prime is 125420051. The next prime is 125420063. The reversal of 125420057 is 750024521.

It is an interprime number because it is at equal distance from previous prime (125420051) and next prime (125420063).

It can be written as a sum of positive squares in only one way, i.e., 121242121 + 4177936 = 11011^2 + 2044^2 .

It is not a de Polignac number, because 125420057 - 2²⁶ = 58311193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125420051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1279748 + ... + 1279845.

It is an arithmetic number, because the mean of its divisors is an integer number (24316143).

Almost surely, 2^125420057 is an apocalyptic number.

It is an amenable number.

125420057 is a deficient number, since it is larger than the sum of its proper divisors (20476801).

125420057 is an equidigital number, since it uses as much as digits as its factorization.

125420057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2559607 (or 2559600 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 125420057 is about 11199.1096521107. The cubic root of 125420057 is about 500.5594497984.

Adding to 125420057 its reverse (750024521), we get a palindrome (875444578).

The spelling of 125420057 in words is "one hundred twenty-five million, four hundred twenty thousand, fifty-seven".