253420257 has 8 divisors (see below), whose sum is σ = 348793600. Its totient is φ = 163496880.

The previous prime is 253420249. The next prime is 253420259. The reversal of 253420257 is 752024352.

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

It is not a de Polignac number, because 253420257 - 2³ = 253420249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253420259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1362382 + ... + 1362567.

It is an arithmetic number, because the mean of its divisors is an integer number (43599200).

Almost surely, 2^253420257 is an apocalyptic number.

It is an amenable number.

253420257 is a deficient number, since it is larger than the sum of its proper divisors (95373343).

253420257 is a wasteful number, since it uses less digits than its factorization.

253420257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2724983.

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 253420257 is about 15919.1789047049. The cubic root of 253420257 is about 632.8203583685.

It can be divided in two parts, 2534 and 20257, that added together give a triangular number (22791 = T₂₁₃).

The spelling of 253420257 in words is "two hundred fifty-three million, four hundred twenty thousand, two hundred fifty-seven".