521376 has 24 divisors (see below), whose sum is σ = 1368864. Its totient is φ = 173760.

The previous prime is 521369. The next prime is 521377. The reversal of 521376 is 673125.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (521377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2620 + ... + 2811.

It is an arithmetic number, because the mean of its divisors is an integer number (57036).

2⁵²¹³⁷⁶ is an apocalyptic number.

It is an amenable number.

521376 is an abundant number, since it is smaller than the sum of its proper divisors (847488).

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

521376 is a wasteful number, since it uses less digits than its factorization.

521376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5444 (or 5436 counting only the distinct ones).

The product of its digits is 1260, while the sum is 24.

The square root of 521376 is about 722.0637091005. The cubic root of 521376 is about 80.4853824261.

The spelling of 521376 in words is "five hundred twenty-one thousand, three hundred seventy-six".