252840185 has 32 divisors (see below), whose sum is σ = 339655680. Its totient is φ = 179424000.

The previous prime is 252840149. The next prime is 252840187. The reversal of 252840185 is 581048252.

It is a happy number.

It is not a de Polignac number, because 252840185 - 2¹⁴ = 252823801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (252840187) 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 31 ways as a sum of consecutive naturals, for example, 360335 + ... + 361035.

It is an arithmetic number, because the mean of its divisors is an integer number (10614240).

Almost surely, 2^252840185 is an apocalyptic number.

It is an amenable number.

252840185 is a deficient number, since it is larger than the sum of its proper divisors (86815495).

252840185 is a wasteful number, since it uses less digits than its factorization.

252840185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929.

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 252840185 is about 15900.9491855046. The cubic root of 252840185 is about 632.3371533665.

The spelling of 252840185 in words is "two hundred fifty-two million, eight hundred forty thousand, one hundred eighty-five".