521290 has 32 divisors (see below), whose sum is σ = 1171584. Its totient is φ = 162240.

The previous prime is 521281. The next prime is 521299. The reversal of 521290 is 92125.

521290 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (521281) and next prime (521299).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (521299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 432 + ... + 1108.

It is an arithmetic number, because the mean of its divisors is an integer number (36612).

2⁵²¹²⁹⁰ is an apocalyptic number.

521290 is an abundant number, since it is smaller than the sum of its proper divisors (650294).

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

521290 is a wasteful number, since it uses less digits than its factorization.

521290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 521290 is about 722.0041551127. The cubic root of 521290 is about 80.4809568782.

The spelling of 521290 in words is "five hundred twenty-one thousand, two hundred ninety".