257303 has 4 divisors (see below), whose sum is σ = 260640. Its totient is φ = 253968.

The previous prime is 257297. The next prime is 257311. The reversal of 257303 is 303752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 257303 - 2⁴ = 257287 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1550 + ... + 1707.

It is an arithmetic number, because the mean of its divisors is an integer number (65160).

2²⁵⁷³⁰³ is an apocalyptic number.

257303 is a deficient number, since it is larger than the sum of its proper divisors (3337).

257303 is an equidigital number, since it uses as much as digits as its factorization.

257303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336.

The product of its (nonzero) digits is 630, while the sum is 20.

The square root of 257303 is about 507.2504312467. The cubic root of 257303 is about 63.6035881314.

The spelling of 257303 in words is "two hundred fifty-seven thousand, three hundred three".