252421161 has 8 divisors (see below), whose sum is σ = 343722624. Its totient is φ = 164700240.

The previous prime is 252421123. The next prime is 252421171. The reversal of 252421161 is 161124252.

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

It is not a de Polignac number, because 252421161 - 2⁶ = 252421097 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (252421121) 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 7 ways as a sum of consecutive naturals, for example, 894970 + ... + 895251.

It is an arithmetic number, because the mean of its divisors is an integer number (42965328).

Almost surely, 2^252421161 is an apocalyptic number.

It is an amenable number.

252421161 is a deficient number, since it is larger than the sum of its proper divisors (91301463).

252421161 is a wasteful number, since it uses less digits than its factorization.

252421161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790271.

The product of its digits is 960, while the sum is 24.

The square root of 252421161 is about 15887.7676531349. The cubic root of 252421161 is about 631.9876427977.

The spelling of 252421161 in words is "two hundred fifty-two million, four hundred twenty-one thousand, one hundred sixty-one".