252966409 has 8 divisors (see below), whose sum is σ = 268441128. Its totient is φ = 237557760.

The previous prime is 252966401. The next prime is 252966421. The reversal of 252966409 is 904669252.

It can be written as a sum of positive squares in 4 ways, for example, as 153066384 + 99900025 = 12372^2 + 9995^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 252966409 - 2³ = 252966401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252966401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8512 + ... + 24049.

It is an arithmetic number, because the mean of its divisors is an integer number (33555141).

Almost surely, 2^252966409 is an apocalyptic number.

It is an amenable number.

252966409 is a deficient number, since it is larger than the sum of its proper divisors (15474719).

252966409 is a wasteful number, since it uses less digits than its factorization.

252966409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33035.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 252966409 is about 15904.9177614975. The cubic root of 252966409 is about 632.4423619149.

The spelling of 252966409 in words is "two hundred fifty-two million, nine hundred sixty-six thousand, four hundred nine".