252645307 has 4 divisors (see below), whose sum is σ = 253006416. Its totient is φ = 252284200.

The previous prime is 252645269. The next prime is 252645353. The reversal of 252645307 is 703546252.

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

It is a cyclic number.

It is not a de Polignac number, because 252645307 - 2¹⁵ = 252612539 is a prime.

It is a super-2 number, since 2×252645307² = 127659302298248498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252649307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179503 + ... + 180904.

It is an arithmetic number, because the mean of its divisors is an integer number (63251604).

Almost surely, 2^252645307 is an apocalyptic number.

252645307 is a deficient number, since it is larger than the sum of its proper divisors (361109).

252645307 is an equidigital number, since it uses as much as digits as its factorization.

252645307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361108.

The product of its (nonzero) digits is 50400, while the sum is 34.

The square root of 252645307 is about 15894.8201310993. The cubic root of 252645307 is about 632.1746524663.

The spelling of 252645307 in words is "two hundred fifty-two million, six hundred forty-five thousand, three hundred seven".