252440642 has 8 divisors (see below), whose sum is σ = 383994432. Its totient is φ = 124442500.

The previous prime is 252440641. The next prime is 252440681. The reversal of 252440642 is 246044252.

252440642 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (252440641) 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 3 ways as a sum of consecutive naturals, for example, 888734 + ... + 889017.

It is an arithmetic number, because the mean of its divisors is an integer number (47999304).

Almost surely, 2^252440642 is an apocalyptic number.

252440642 is a deficient number, since it is larger than the sum of its proper divisors (131553790).

252440642 is a wasteful number, since it uses less digits than its factorization.

252440642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1777824.

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 252440642 is about 15888.3807230315. The cubic root of 252440642 is about 632.0039005928.

Adding to 252440642 its reverse (246044252), we get a palindrome (498484894).

The spelling of 252440642 in words is "two hundred fifty-two million, four hundred forty thousand, six hundred forty-two".