521249 has 8 divisors (see below), whose sum is σ = 551232. Its totient is φ = 491920.

The previous prime is 521243. The next prime is 521251. The reversal of 521249 is 942125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521243) 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, 2927 + ... + 3099.

It is an arithmetic number, because the mean of its divisors is an integer number (68904).

2⁵²¹²⁴⁹ is an apocalyptic number.

It is an amenable number.

521249 is a deficient number, since it is larger than the sum of its proper divisors (29983).

521249 is a wasteful number, since it uses less digits than its factorization.

521249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327.

The product of its digits is 720, while the sum is 23.

The square root of 521249 is about 721.9757613660. The cubic root of 521249 is about 80.4788468526.

The spelling of 521249 in words is "five hundred twenty-one thousand, two hundred forty-nine".