521230425 has 24 divisors (see below), whose sum is σ = 862873344. Its totient is φ = 277632960.

The previous prime is 521230403. The next prime is 521230469. The reversal of 521230425 is 524032125.

It is not a de Polignac number, because 521230425 - 2⁶ = 521230361 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521230395 and 521230404.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60699 + ... + 68751.

It is an arithmetic number, because the mean of its divisors is an integer number (35953056).

Almost surely, 2^521230425 is an apocalyptic number.

It is an amenable number.

521230425 is a deficient number, since it is larger than the sum of its proper divisors (341642919).

521230425 is a wasteful number, since it uses less digits than its factorization.

521230425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8929 (or 8924 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 521230425 is about 22830.4714143182. The cubic root of 521230425 is about 804.7789087161.

The spelling of 521230425 in words is "five hundred twenty-one million, two hundred thirty thousand, four hundred twenty-five".