257266 has 8 divisors (see below), whose sum is σ = 388080. Its totient is φ = 127908.

The previous prime is 257263. The next prime is 257273. The reversal of 257266 is 662752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (257263) 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, 405 + ... + 823.

It is an arithmetic number, because the mean of its divisors is an integer number (48510).

2²⁵⁷²⁶⁶ is an apocalyptic number.

257266 is a deficient number, since it is larger than the sum of its proper divisors (130814).

257266 is a wasteful number, since it uses less digits than its factorization.

257266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728.

The product of its digits is 5040, while the sum is 28.

The square root of 257266 is about 507.2139587985. The cubic root of 257266 is about 63.6005392673.

The spelling of 257266 in words is "two hundred fifty-seven thousand, two hundred sixty-six".