521056140 has 96 divisors (see below), whose sum is σ = 1618686720. Its totient is φ = 124166400.

The previous prime is 521056139. The next prime is 521056141. The reversal of 521056140 is 41650125.

It is an interprime number because it is at equal distance from previous prime (521056139) and next prime (521056141).

It is a self number, because there is not a number n which added to its sum of digits gives 521056140.

It is not an unprimeable number, because it can be changed into a prime (521056141) 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 31 ways as a sum of consecutive naturals, for example, 32250 + ... + 45630.

It is an arithmetic number, because the mean of its divisors is an integer number (16861320).

Almost surely, 2^521056140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521056140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (809343360).

521056140 is an abundant number, since it is smaller than the sum of its proper divisors (1097630580).

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

521056140 is a wasteful number, since it uses less digits than its factorization.

521056140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13463 (or 13461 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 521056140 is about 22826.6541569280. The cubic root of 521056140 is about 804.6892001334.

The spelling of 521056140 in words is "five hundred twenty-one million, fifty-six thousand, one hundred forty".