521245 has 8 divisors (see below), whose sum is σ = 636120. Its totient is φ = 409920.

The previous prime is 521243. The next prime is 521251. The reversal of 521245 is 542125.

It can be written as a sum of positive squares in 4 ways, for example, as 11449 + 509796 = 107^2 + 714^2 .

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

It is not a de Polignac number, because 521245 - 2¹ = 521243 is a prime.

It is a congruent 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, 550 + ... + 1159.

It is an arithmetic number, because the mean of its divisors is an integer number (79515).

2⁵²¹²⁴⁵ is an apocalyptic number.

It is an amenable number.

521245 is a deficient number, since it is larger than the sum of its proper divisors (114875).

521245 is a wasteful number, since it uses less digits than its factorization.

521245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775.

The product of its digits is 400, while the sum is 19.

The square root of 521245 is about 721.9729911846. The cubic root of 521245 is about 80.4786409905.

The spelling of 521245 in words is "five hundred twenty-one thousand, two hundred forty-five".