257453 has 4 divisors (see below), whose sum is σ = 294240. Its totient is φ = 220668.

The previous prime is 257447. The next prime is 257459. The reversal of 257453 is 354752.

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 an interprime number because it is at equal distance from previous prime (257447) and next prime (257459).

It is not a de Polignac number, because 257453 - 2⁴ = 257437 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257459) 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, 18383 + ... + 18396.

It is an arithmetic number, because the mean of its divisors is an integer number (73560).

2²⁵⁷⁴⁵³ is an apocalyptic number.

It is an amenable number.

257453 is a deficient number, since it is larger than the sum of its proper divisors (36787).

257453 is an equidigital number, since it uses as much as digits as its factorization.

257453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36786.

The product of its digits is 4200, while the sum is 26.

The square root of 257453 is about 507.3982656651. The cubic root of 257453 is about 63.6159453974.

The spelling of 257453 in words is "two hundred fifty-seven thousand, four hundred fifty-three".