253542457 has 4 divisors (see below), whose sum is σ = 289762816. Its totient is φ = 217322100.

The previous prime is 253542449. The next prime is 253542461. The reversal of 253542457 is 754245352.

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 253542457 - 2³ = 253542449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253542467) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 18110169 + ... + 18110182.

It is an arithmetic number, because the mean of its divisors is an integer number (72440704).

Almost surely, 2^253542457 is an apocalyptic number.

It is an amenable number.

253542457 is a deficient number, since it is larger than the sum of its proper divisors (36220359).

253542457 is an equidigital number, since it uses as much as digits as its factorization.

253542457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36220358.

The product of its digits is 168000, while the sum is 37.

The square root of 253542457 is about 15923.0165797816. The cubic root of 253542457 is about 632.9220579752.

The spelling of 253542457 in words is "two hundred fifty-three million, five hundred forty-two thousand, four hundred fifty-seven".