263257 has 2 divisors, whose sum is σ = 263258. Its totient is φ = 263256.

The previous prime is 263239. The next prime is 263267. The reversal of 263257 is 752362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215296 + 47961 = 464^2 + 219^2 .

It is a cyclic number.

It is not a de Polignac number, because 263257 - 2⁷ = 263129 is a prime.

It is a d-powerful number, because it can be written as 2⁸ + 6³ + 2¹⁸ + 3² + 5⁴ + 7 .

It is not a weakly prime, because it can be changed into another prime (263227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131628 + 131629.

It is an arithmetic number, because the mean of its divisors is an integer number (131629).

2²⁶³²⁵⁷ is an apocalyptic number.

It is an amenable number.

263257 is a deficient number, since it is larger than the sum of its proper divisors (1).

263257 is an equidigital number, since it uses as much as digits as its factorization.

263257 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 263257 is about 513.0857628116. The cubic root of 263257 is about 64.0904482852.

The spelling of 263257 in words is "two hundred sixty-three thousand, two hundred fifty-seven".