521367425 has 6 divisors (see below), whose sum is σ = 646495638. Its totient is φ = 417093920.

The previous prime is 521367403. The next prime is 521367499. The reversal of 521367425 is 524763125.

It can be written as a sum of positive squares in 3 ways, for example, as 53597041 + 467770384 = 7321^2 + 21628^2 .

It is not a de Polignac number, because 521367425 - 2⁶ = 521367361 is a prime.

It is a super-2 number, since 2×521367425² = 543647983702261250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10427324 + ... + 10427373.

It is an arithmetic number, because the mean of its divisors is an integer number (107749273).

Almost surely, 2^521367425 is an apocalyptic number.

It is an amenable number.

521367425 is a deficient number, since it is larger than the sum of its proper divisors (125128213).

521367425 is a wasteful number, since it uses less digits than its factorization.

521367425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20854707 (or 20854702 counting only the distinct ones).

The product of its digits is 50400, while the sum is 35.

The square root of 521367425 is about 22833.4715932554. The cubic root of 521367425 is about 804.8494117968.

The spelling of 521367425 in words is "five hundred twenty-one million, three hundred sixty-seven thousand, four hundred twenty-five".