253042665 has 32 divisors (see below), whose sum is σ = 444718080. Its totient is φ = 122291136.

The previous prime is 253042631. The next prime is 253042679. The reversal of 253042665 is 566240352.

It is not a de Polignac number, because 253042665 - 2¹⁶ = 252977129 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12747 + ... + 25856.

It is an arithmetic number, because the mean of its divisors is an integer number (13897440).

Almost surely, 2^253042665 is an apocalyptic number.

It is an amenable number.

253042665 is a deficient number, since it is larger than the sum of its proper divisors (191675415).

253042665 is a wasteful number, since it uses less digits than its factorization.

253042665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38653.

The product of its (nonzero) digits is 43200, while the sum is 33.

The square root of 253042665 is about 15907.3148268336. The cubic root of 253042665 is about 632.5059048437.

The spelling of 253042665 in words is "two hundred fifty-three million, forty-two thousand, six hundred sixty-five".