252506609 has 2 divisors, whose sum is σ = 252506610. Its totient is φ = 252506608.

The previous prime is 252506603. The next prime is 252506623. The reversal of 252506609 is 906605252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189145009 + 63361600 = 13753^2 + 7960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252506609 is a prime.

It is not a weakly prime, because it can be changed into another prime (252506603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126253304 + 126253305.

It is an arithmetic number, because the mean of its divisors is an integer number (126253305).

Almost surely, 2^252506609 is an apocalyptic number.

It is an amenable number.

252506609 is a deficient number, since it is larger than the sum of its proper divisors (1).

252506609 is an equidigital number, since it uses as much as digits as its factorization.

252506609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 252506609 is about 15890.4565384384. The cubic root of 252506609 is about 632.0589468933.

The spelling of 252506609 in words is "two hundred fifty-two million, five hundred six thousand, six hundred nine".