252364421 has 2 divisors, whose sum is σ = 252364422. Its totient is φ = 252364420.

The previous prime is 252364393. The next prime is 252364423. The reversal of 252364421 is 124463252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198415396 + 53949025 = 14086^2 + 7345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252364421 is a prime.

It is a Sophie Germain prime.

Together with 252364423, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252364423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126182210 + 126182211.

It is an arithmetic number, because the mean of its divisors is an integer number (126182211).

Almost surely, 2^252364421 is an apocalyptic number.

It is an amenable number.

252364421 is a deficient number, since it is larger than the sum of its proper divisors (1).

252364421 is an equidigital number, since it uses as much as digits as its factorization.

252364421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 29.

The square root of 252364421 is about 15885.9819022936. The cubic root of 252364421 is about 631.9402858779.

The spelling of 252364421 in words is "two hundred fifty-two million, three hundred sixty-four thousand, four hundred twenty-one".