252042649 has 4 divisors (see below), whose sum is σ = 252451764. Its totient is φ = 251633536.

The previous prime is 252042641. The next prime is 252042653. The reversal of 252042649 is 946240252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66129424 + 185913225 = 8132^2 + 13635^2 .

It is a cyclic number.

It is not a de Polignac number, because 252042649 - 2³ = 252042641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252042641) 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, 203632 + ... + 204865.

It is an arithmetic number, because the mean of its divisors is an integer number (63112941).

Almost surely, 2^252042649 is an apocalyptic number.

It is an amenable number.

252042649 is a deficient number, since it is larger than the sum of its proper divisors (409115).

252042649 is an equidigital number, since it uses as much as digits as its factorization.

252042649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409114.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 252042649 is about 15875.8511267900. The cubic root of 252042649 is about 631.6715908800.

The spelling of 252042649 in words is "two hundred fifty-two million, forty-two thousand, six hundred forty-nine".