521394 has 16 divisors (see below), whose sum is σ = 1059168. Its totient is φ = 171072.

The previous prime is 521393. The next prime is 521399. The reversal of 521394 is 493125.

It is not an unprimeable number, because it can be changed into a prime (521393) 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, 247 + ... + 1050.

It is an arithmetic number, because the mean of its divisors is an integer number (66198).

2⁵²¹³⁹⁴ is an apocalyptic number.

521394 is an abundant number, since it is smaller than the sum of its proper divisors (537774).

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

521394 is a wasteful number, since it uses less digits than its factorization.

521394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369.

The product of its digits is 1080, while the sum is 24.

The square root of 521394 is about 722.0761732671. The cubic root of 521394 is about 80.4863086420.

The spelling of 521394 in words is "five hundred twenty-one thousand, three hundred ninety-four".