425020400521 has 2 divisors, whose sum is σ = 425020400522. Its totient is φ = 425020400520.

The previous prime is 425020400507. The next prime is 425020400537. The reversal of 425020400521 is 125004020524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 417522745600 + 7497654921 = 646160^2 + 86589^2 .

It is a cyclic number.

It is not a de Polignac number, because 425020400521 - 2²³ = 425012011913 is a prime.

It is not a weakly prime, because it can be changed into another prime (425020400501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212510200260 + 212510200261.

It is an arithmetic number, because the mean of its divisors is an integer number (212510200261).

Almost surely, 2^425020400521 is an apocalyptic number.

It is an amenable number.

425020400521 is a deficient number, since it is larger than the sum of its proper divisors (1).

425020400521 is an equidigital number, since it uses as much as digits as its factorization.

425020400521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3200, while the sum is 25.

The spelling of 425020400521 in words is "four hundred twenty-five billion, twenty million, four hundred thousand, five hundred twenty-one".