125604290621 has 2 divisors, whose sum is σ = 125604290622. Its totient is φ = 125604290620.

The previous prime is 125604290549. The next prime is 125604290629. The reversal of 125604290621 is 126092406521.

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., 99095892025 + 26508398596 = 314795^2 + 162814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125604290621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125604290629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62802145310 + 62802145311.

It is an arithmetic number, because the mean of its divisors is an integer number (62802145311).

Almost surely, 2^125604290621 is an apocalyptic number.

It is an amenable number.

125604290621 is a deficient number, since it is larger than the sum of its proper divisors (1).

125604290621 is an equidigital number, since it uses as much as digits as its factorization.

125604290621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 125604290621 in words is "one hundred twenty-five billion, six hundred four million, two hundred ninety thousand, six hundred twenty-one".