257323 has 8 divisors (see below), whose sum is σ = 284400. Its totient is φ = 230880.

The previous prime is 257321. The next prime is 257339. The reversal of 257323 is 323752.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 257323 - 2¹ = 257321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257294 and 257303.

It is not an unprimeable number, because it can be changed into a prime (257321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1561 + ... + 1717.

It is an arithmetic number, because the mean of its divisors is an integer number (35550).

2²⁵⁷³²³ is an apocalyptic number.

257323 is a deficient number, since it is larger than the sum of its proper divisors (27077).

257323 is a wasteful number, since it uses less digits than its factorization.

257323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317.

The product of its digits is 1260, while the sum is 22.

The square root of 257323 is about 507.2701449918. The cubic root of 257323 is about 63.6052360443.

The spelling of 257323 in words is "two hundred fifty-seven thousand, three hundred twenty-three".