252406717 has 2 divisors, whose sum is σ = 252406718. Its totient is φ = 252406716.

The previous prime is 252406673. The next prime is 252406727. The reversal of 252406717 is 717604252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 251571321 + 835396 = 15861^2 + 914^2 .

It is a cyclic number.

It is not a de Polignac number, because 252406717 - 2¹⁵ = 252373949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252406727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126203358 + 126203359.

It is an arithmetic number, because the mean of its divisors is an integer number (126203359).

Almost surely, 2^252406717 is an apocalyptic number.

It is an amenable number.

252406717 is a deficient number, since it is larger than the sum of its proper divisors (1).

252406717 is an equidigital number, since it uses as much as digits as its factorization.

252406717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 252406717 is about 15887.3130830861. The cubic root of 252406717 is about 631.9755880719.

The spelling of 252406717 in words is "two hundred fifty-two million, four hundred six thousand, seven hundred seventeen".