521226 has 24 divisors (see below), whose sum is σ = 1179360. Its totient is φ = 166056.

The previous prime is 521201. The next prime is 521231. The reversal of 521226 is 622125.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 521199 and 521208.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 216 + ... + 1043.

It is an arithmetic number, because the mean of its divisors is an integer number (49140).

2⁵²¹²²⁶ is an apocalyptic number.

521226 is an abundant number, since it is smaller than the sum of its proper divisors (658134).

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

521226 is a wasteful number, since it uses less digits than its factorization.

521226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290 (or 1287 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 521226 is about 721.9598326777. The cubic root of 521226 is about 80.4776631312.

It can be divided in two parts, 521 and 226, that added together give a palindrome (747).

The spelling of 521226 in words is "five hundred twenty-one thousand, two hundred twenty-six".