521040972 has 24 divisors (see below), whose sum is σ = 1225046592. Its totient is φ = 172354000.

The previous prime is 521040959. The next prime is 521040983. The reversal of 521040972 is 279040125.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164154 + ... + 167297.

It is an arithmetic number, because the mean of its divisors is an integer number (51043608).

Almost surely, 2^521040972 is an apocalyptic number.

It is an amenable number.

521040972 is an abundant number, since it is smaller than the sum of its proper divisors (704005620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521040972 is a wasteful number, since it uses less digits than its factorization.

521040972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331589 (or 331587 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 521040972 is about 22826.3219113374. The cubic root of 521040972 is about 804.6813918614.

The spelling of 521040972 in words is "five hundred twenty-one million, forty thousand, nine hundred seventy-two".