521424125 has 16 divisors (see below), whose sum is σ = 684989760. Its totient is φ = 395182800.

The previous prime is 521424121. The next prime is 521424133.

521424125 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 521424125 - 2² = 521424121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521424094 and 521424103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521424121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107399 + ... + 112148.

It is an arithmetic number, because the mean of its divisors is an integer number (42811860).

Almost surely, 2^521424125 is an apocalyptic number.

It is an amenable number.

521424125 is a deficient number, since it is larger than the sum of its proper divisors (163565635).

521424125 is a wasteful number, since it uses less digits than its factorization.

521424125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219581 (or 219571 counting only the distinct ones).

The product of its digits is 3200, while the sum is 26.

The square root of 521424125 is about 22834.7131578218. The cubic root of 521424125 is about 804.8785871955.

The spelling of 521424125 in words is "five hundred twenty-one million, four hundred twenty-four thousand, one hundred twenty-five".