521164 has 18 divisors (see below), whose sum is σ = 1061340. Its totient is φ = 223272.

The previous prime is 521161. The next prime is 521167. The reversal of 521164 is 461125.

It is an interprime number because it is at equal distance from previous prime (521161) and next prime (521167).

It is a super-2 number, since 2×521164² = 543223829792, which contains 22 as substring.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (521161) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1134 + ... + 1525.

2⁵²¹¹⁶⁴ is an apocalyptic number.

It is an amenable number.

521164 is an abundant number, since it is smaller than the sum of its proper divisors (540176).

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

521164 is a wasteful number, since it uses less digits than its factorization.

521164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2677 (or 2668 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 521164 is about 721.9168927238. The cubic root of 521164 is about 80.4744720567.

Adding to 521164 its reverse (461125), we get a palindrome (982289).

The spelling of 521164 in words is "five hundred twenty-one thousand, one hundred sixty-four".