253245665 has 8 divisors (see below), whose sum is σ = 313698048. Its totient is φ = 196061040.

The previous prime is 253245659. The next prime is 253245677. The reversal of 253245665 is 566542352.

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

It is not a de Polignac number, because 253245665 - 2²⁶ = 186136801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 816767 + ... + 817076.

It is an arithmetic number, because the mean of its divisors is an integer number (39212256).

Almost surely, 2^253245665 is an apocalyptic number.

It is an amenable number.

253245665 is a deficient number, since it is larger than the sum of its proper divisors (60452383).

253245665 is a wasteful number, since it uses less digits than its factorization.

253245665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633879.

The product of its digits is 216000, while the sum is 38.

The square root of 253245665 is about 15913.6942599762. The cubic root of 253245665 is about 632.6749993567.

The spelling of 253245665 in words is "two hundred fifty-three million, two hundred forty-five thousand, six hundred sixty-five".