521236 has 12 divisors (see below), whose sum is σ = 917280. Its totient is φ = 259160.

The previous prime is 521231. The next prime is 521243. The reversal of 521236 is 632125.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521231) 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, 1035 + ... + 1453.

It is an arithmetic number, because the mean of its divisors is an integer number (76440).

2⁵²¹²³⁶ is an apocalyptic number.

It is an amenable number.

521236 is a deficient number, since it is larger than the sum of its proper divisors (396044).

521236 is a wasteful number, since it uses less digits than its factorization.

521236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734 (or 732 counting only the distinct ones).

The product of its digits is 360, while the sum is 19.

The square root of 521236 is about 721.9667582375. The cubic root of 521236 is about 80.4781777969.

Subtracting 521236 from its reverse (632125), we obtain a square (110889 = 333²).

It can be divided in two parts, 521 and 236, that added together give a palindrome (757).

The spelling of 521236 in words is "five hundred twenty-one thousand, two hundred thirty-six".