502561 has 4 divisors (see below), whose sum is σ = 504000. Its totient is φ = 501124.

The previous prime is 502553. The next prime is 502591. The reversal of 502561 is 165205.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 502561 - 2³ = 502553 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (502501) 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, 180 + ... + 1018.

It is an arithmetic number, because the mean of its divisors is an integer number (126000).

2⁵⁰²⁵⁶¹ is an apocalyptic number.

It is an amenable number.

502561 is a deficient number, since it is larger than the sum of its proper divisors (1439).

502561 is an equidigital number, since it uses as much as digits as its factorization.

502561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 502561 is about 708.9153687148. The cubic root of 502561 is about 79.5053330283.

Adding to 502561 its reverse (165205), we get a palindrome (667766).

The spelling of 502561 in words is "five hundred two thousand, five hundred sixty-one".