502921 has 2 divisors, whose sum is σ = 502922. Its totient is φ = 502920.

The previous prime is 502919. The next prime is 502937. The reversal of 502921 is 129205.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373321 + 129600 = 611^2 + 360^2 .

It is a cyclic number.

It is not a de Polignac number, because 502921 - 2¹ = 502919 is a prime.

Together with 502919, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (502961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251460 + 251461.

It is an arithmetic number, because the mean of its divisors is an integer number (251461).

2⁵⁰²⁹²¹ is an apocalyptic number.

It is an amenable number.

502921 is a deficient number, since it is larger than the sum of its proper divisors (1).

502921 is an equidigital number, since it uses as much as digits as its factorization.

502921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 502921 is about 709.1692322711. The cubic root of 502921 is about 79.5243125408.

It can be divided in two parts, 5029 and 21, that added together give a triangular number (5050 = T₁₀₀).

The spelling of 502921 in words is "five hundred two thousand, nine hundred twenty-one".