252145689 has 8 divisors (see below), whose sum is σ = 338421312. Its totient is φ = 166983600.

The previous prime is 252145687. The next prime is 252145703. The reversal of 252145689 is 986541252.

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

It is not a de Polignac number, because 252145689 - 2¹ = 252145687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 252145689.

It is not an unprimeable number, because it can be changed into a prime (252145687) 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, 277854 + ... + 278759.

It is an arithmetic number, because the mean of its divisors is an integer number (42302664).

Almost surely, 2^252145689 is an apocalyptic number.

It is an amenable number.

252145689 is a deficient number, since it is larger than the sum of its proper divisors (86275623).

252145689 is a wasteful number, since it uses less digits than its factorization.

252145689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556767.

The product of its digits is 172800, while the sum is 42.

The square root of 252145689 is about 15879.0959755271. The cubic root of 252145689 is about 631.7576590823.

It can be divided in two parts, 25214 and 5689, that added together give a palindrome (30903).

The spelling of 252145689 in words is "two hundred fifty-two million, one hundred forty-five thousand, six hundred eighty-nine".