521145460 has 24 divisors (see below), whose sum is σ = 1193897376. Its totient is φ = 189507360.

The previous prime is 521145451. The next prime is 521145461. The reversal of 521145460 is 64541125.

It is a super-2 number, since 2×521145460² = 543185180957223200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521145461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1184202 + ... + 1184641.

It is an arithmetic number, because the mean of its divisors is an integer number (49745724).

Almost surely, 2^521145460 is an apocalyptic number.

It is an amenable number.

521145460 is an abundant number, since it is smaller than the sum of its proper divisors (672751916).

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

521145460 is a wasteful number, since it uses less digits than its factorization.

521145460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2368863 (or 2368861 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 521145460 is about 22828.6105578066. The cubic root of 521145460 is about 804.7351777337.

Adding to 521145460 its reverse (64541125), we get a palindrome (585686585).

It can be divided in two parts, 52114 and 5460, that multiplied together give a triangular number (284542440 = T₂₃₈₅₅).

The spelling of 521145460 in words is "five hundred twenty-one million, one hundred forty-five thousand, four hundred sixty".