425021957 has 2 divisors, whose sum is σ = 425021958. Its totient is φ = 425021956.

The previous prime is 425021951. The next prime is 425022047. The reversal of 425021957 is 759120524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242393761 + 182628196 = 15569^2 + 13514^2 .

It is a cyclic number.

It is not a de Polignac number, because 425021957 - 2²⁴ = 408244741 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425021951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212510978 + 212510979.

It is an arithmetic number, because the mean of its divisors is an integer number (212510979).

Almost surely, 2^425021957 is an apocalyptic number.

It is an amenable number.

425021957 is a deficient number, since it is larger than the sum of its proper divisors (1).

425021957 is an equidigital number, since it uses as much as digits as its factorization.

425021957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 425021957 is about 20616.0606566822. The cubic root of 425021957 is about 751.8602455745.

The spelling of 425021957 in words is "four hundred twenty-five million, twenty-one thousand, nine hundred fifty-seven".