252689761 has 4 divisors (see below), whose sum is σ = 259519252. Its totient is φ = 245860272.

The previous prime is 252689737. The next prime is 252689771. The reversal of 252689761 is 167986252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 236206161 + 16483600 = 15369^2 + 4060^2 .

It is a cyclic number.

It is not a de Polignac number, because 252689761 - 2⁵ = 252689729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252689771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3414690 + ... + 3414763.

It is an arithmetic number, because the mean of its divisors is an integer number (64879813).

Almost surely, 2^252689761 is an apocalyptic number.

It is an amenable number.

252689761 is a deficient number, since it is larger than the sum of its proper divisors (6829491).

252689761 is an equidigital number, since it uses as much as digits as its factorization.

252689761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6829490.

The product of its digits is 362880, while the sum is 46.

The square root of 252689761 is about 15896.2184496817. The cubic root of 252689761 is about 632.2117282178.

The spelling of 252689761 in words is "two hundred fifty-two million, six hundred eighty-nine thousand, seven hundred sixty-one".