252686069 has 4 divisors (see below), whose sum is σ = 256147596. Its totient is φ = 249224544.

The previous prime is 252686059. The next prime is 252686081. The reversal of 252686069 is 960686252.

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 66227044 + 186459025 = 8138^2 + 13655^2 .

It is a cyclic number.

It is not a de Polignac number, because 252686069 - 2²⁰ = 251637493 is a prime.

It is a super-2 number, since 2×252686069² = 127700498933345522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252686029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1730654 + ... + 1730799.

It is an arithmetic number, because the mean of its divisors is an integer number (64036899).

Almost surely, 2^252686069 is an apocalyptic number.

It is an amenable number.

252686069 is a deficient number, since it is larger than the sum of its proper divisors (3461527).

252686069 is an equidigital number, since it uses as much as digits as its factorization.

252686069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3461526.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 252686069 is about 15896.1023210094. The cubic root of 252686069 is about 632.2086491628.

The spelling of 252686069 in words is "two hundred fifty-two million, six hundred eighty-six thousand, sixty-nine".