252959621 has 2 divisors, whose sum is σ = 252959622. Its totient is φ = 252959620.

The previous prime is 252959599. The next prime is 252959633. The reversal of 252959621 is 126959252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202350625 + 50608996 = 14225^2 + 7114^2 .

It is a cyclic number.

It is not a de Polignac number, because 252959621 - 2¹⁰ = 252958597 is a prime.

It is a Sophie Germain 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 (252952621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126479810 + 126479811.

It is an arithmetic number, because the mean of its divisors is an integer number (126479811).

Almost surely, 2^252959621 is an apocalyptic number.

It is an amenable number.

252959621 is a deficient number, since it is larger than the sum of its proper divisors (1).

252959621 is an equidigital number, since it uses as much as digits as its factorization.

252959621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 41.

The square root of 252959621 is about 15904.7043669475. The cubic root of 252959621 is about 632.4367049620.

The spelling of 252959621 in words is "two hundred fifty-two million, nine hundred fifty-nine thousand, six hundred twenty-one".