521210425 has 24 divisors (see below), whose sum is σ = 659556000. Its totient is φ = 408468480.

The previous prime is 521210407. The next prime is 521210539. The reversal of 521210425 is 524012125.

It is not a de Polignac number, because 521210425 - 2¹⁷ = 521079353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521210396 and 521210405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 661882 + ... + 662668.

It is an arithmetic number, because the mean of its divisors is an integer number (27481500).

Almost surely, 2^521210425 is an apocalyptic number.

It is an amenable number.

521210425 is a deficient number, since it is larger than the sum of its proper divisors (138345575).

521210425 is a wasteful number, since it uses less digits than its factorization.

521210425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305 (or 1300 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 521210425 is about 22830.0333990119. The cubic root of 521210425 is about 804.7686152622.

It can be divided in two parts, 5212 and 10425, that multiplied together give a triangular number (54335100 = T₁₀₄₂₄).

The spelling of 521210425 in words is "five hundred twenty-one million, two hundred ten thousand, four hundred twenty-five".