252642749 has 4 divisors (see below), whose sum is σ = 253840320. Its totient is φ = 251445180.

The previous prime is 252642739. The next prime is 252642769. The reversal of 252642749 is 947246252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 252642749 - 2⁸ = 252642493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252642739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 598469 + ... + 598890.

It is an arithmetic number, because the mean of its divisors is an integer number (63460080).

Almost surely, 2^252642749 is an apocalyptic number.

It is an amenable number.

252642749 is a deficient number, since it is larger than the sum of its proper divisors (1197571).

252642749 is a wasteful number, since it uses less digits than its factorization.

252642749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197570.

The product of its digits is 241920, while the sum is 41.

The square root of 252642749 is about 15894.7396644299. The cubic root of 252642749 is about 632.1725188978.

The spelling of 252642749 in words is "two hundred fifty-two million, six hundred forty-two thousand, seven hundred forty-nine".