252104809 has 4 divisors (see below), whose sum is σ = 275023440. Its totient is φ = 229186180.

The previous prime is 252104773. The next prime is 252104819. The reversal of 252104809 is 908401252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 252104809 - 2¹¹ = 252102761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252104819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11459299 + ... + 11459320.

It is an arithmetic number, because the mean of its divisors is an integer number (68755860).

Almost surely, 2^252104809 is an apocalyptic number.

It is an amenable number.

252104809 is a deficient number, since it is larger than the sum of its proper divisors (22918631).

252104809 is a wasteful number, since it uses less digits than its factorization.

252104809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22918630.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 252104809 is about 15877.8086964165. The cubic root of 252104809 is about 631.7235152650.

The spelling of 252104809 in words is "two hundred fifty-two million, one hundred four thousand, eight hundred nine".