521994 has 24 divisors (see below), whose sum is σ = 1149120. Its totient is φ = 157960.

The previous prime is 521993. The next prime is 521999. The reversal of 521994 is 499125.

It is a happy number.

521994 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 521994.

It is not an unprimeable number, because it can be changed into a prime (521993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 367 + ... + 1085.

It is an arithmetic number, because the mean of its divisors is an integer number (47880).

2⁵²¹⁹⁹⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (574560).

521994 is an abundant number, since it is smaller than the sum of its proper divisors (627126).

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

521994 is a wasteful number, since it uses less digits than its factorization.

521994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746 (or 735 counting only the distinct ones).

The product of its digits is 3240, while the sum is 30.

The square root of 521994 is about 722.4915224416. The cubic root of 521994 is about 80.5171703147.

The spelling of 521994 in words is "five hundred twenty-one thousand, nine hundred ninety-four".