260257 has 4 divisors (see below), whose sum is σ = 261396. Its totient is φ = 259120.

The previous prime is 260231. The next prime is 260263. The reversal of 260257 is 752062.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 38416 + 221841 = 196^2 + 471^2 .

It is a cyclic number.

It is not a de Polignac number, because 260257 - 2¹⁵ = 227489 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

260257 is a lucky number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (260207) 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, 94 + ... + 727.

It is an arithmetic number, because the mean of its divisors is an integer number (65349).

2²⁶⁰²⁵⁷ is an apocalyptic number.

It is an amenable number.

260257 is a deficient number, since it is larger than the sum of its proper divisors (1139).

260257 is an equidigital number, since it uses as much as digits as its factorization.

260257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 260257 is about 510.1538983483. The cubic root of 260257 is about 63.8460655968.

The spelling of 260257 in words is "two hundred sixty thousand, two hundred fifty-seven".