252258409 has 4 divisors (see below), whose sum is σ = 271662916. Its totient is φ = 232853904.

The previous prime is 252258397. The next prime is 252258431. The reversal of 252258409 is 904852252.

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 92160000 + 160098409 = 9600^2 + 12653^2 .

It is a cyclic number.

It is not a de Polignac number, because 252258409 - 2²¹ = 250161257 is a prime.

It is a super-2 number, since 2×252258409² = 127268609822422562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252258109) 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, 9702234 + ... + 9702259.

It is an arithmetic number, because the mean of its divisors is an integer number (67915729).

Almost surely, 2^252258409 is an apocalyptic number.

It is an amenable number.

252258409 is a deficient number, since it is larger than the sum of its proper divisors (19404507).

252258409 is a wasteful number, since it uses less digits than its factorization.

252258409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19404506.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 252258409 is about 15882.6448993862. The cubic root of 252258409 is about 631.8517860328.

The spelling of 252258409 in words is "two hundred fifty-two million, two hundred fifty-eight thousand, four hundred nine".