252617641 has 2 divisors, whose sum is σ = 252617642. Its totient is φ = 252617640.

The previous prime is 252617633. The next prime is 252617657. The reversal of 252617641 is 146716252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219899241 + 32718400 = 14829^2 + 5720^2 .

It is a cyclic number.

It is not a de Polignac number, because 252617641 - 2³ = 252617633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 252617597 and 252617606.

It is not a weakly prime, because it can be changed into another prime (252617681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126308820 + 126308821.

It is an arithmetic number, because the mean of its divisors is an integer number (126308821).

Almost surely, 2^252617641 is an apocalyptic number.

It is an amenable number.

252617641 is a deficient number, since it is larger than the sum of its proper divisors (1).

252617641 is an equidigital number, since it uses as much as digits as its factorization.

252617641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 252617641 is about 15893.9498237537. The cubic root of 252617641 is about 632.1515761324.

The spelling of 252617641 in words is "two hundred fifty-two million, six hundred seventeen thousand, six hundred forty-one".