252540161 has 8 divisors (see below), whose sum is σ = 269649600. Its totient is φ = 235941552.

The previous prime is 252540137. The next prime is 252540173. The reversal of 252540161 is 161045252.

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 252540161 - 2¹⁰ = 252539137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 252540161.

It is not an unprimeable number, because it can be changed into a prime (252540121) 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, 126686 + ... + 128663.

It is an arithmetic number, because the mean of its divisors is an integer number (33706200).

Almost surely, 2^252540161 is an apocalyptic number.

It is an amenable number.

252540161 is a deficient number, since it is larger than the sum of its proper divisors (17109439).

252540161 is a wasteful number, since it uses less digits than its factorization.

252540161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255415.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 252540161 is about 15891.5122313768. The cubic root of 252540161 is about 632.0869407514.

The spelling of 252540161 in words is "two hundred fifty-two million, five hundred forty thousand, one hundred sixty-one".