257263 has 2 divisors, whose sum is σ = 257264. Its totient is φ = 257262.

The previous prime is 257249. The next prime is 257273. The reversal of 257263 is 362752.

257263 is nontrivially palindromic in base 4.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257263 is a prime.

It is a d-powerful number, because it can be written as 2² + 5⁶ + 2¹⁰ + 7⁵ + 6⁶ + 3¹¹ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128631 + 128632.

It is an arithmetic number, because the mean of its divisors is an integer number (128632).

2²⁵⁷²⁶³ is an apocalyptic number.

257263 is a deficient number, since it is larger than the sum of its proper divisors (1).

257263 is an equidigital number, since it uses as much as digits as its factorization.

257263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 25.

The square root of 257263 is about 507.2110014580. The cubic root of 257263 is about 63.6002920493.

The spelling of 257263 in words is "two hundred fifty-seven thousand, two hundred sixty-three".