257471 has 4 divisors (see below), whose sum is σ = 261072. Its totient is φ = 253872.

The previous prime is 257459. The next prime is 257473. The reversal of 257471 is 174752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 257471 - 2⁶ = 257407 is a prime.

It is a super-3 number, since 3×257471³ = 51204274142694333, which contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 257471.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 257471.

It is not an unprimeable number, because it can be changed into a prime (257473) 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, 1691 + ... + 1836.

It is an arithmetic number, because the mean of its divisors is an integer number (65268).

2²⁵⁷⁴⁷¹ is an apocalyptic number.

257471 is a deficient number, since it is larger than the sum of its proper divisors (3601).

257471 is an equidigital number, since it uses as much as digits as its factorization.

257471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3600.

The product of its digits is 1960, while the sum is 26.

The square root of 257471 is about 507.4160029010. The cubic root of 257471 is about 63.6174279467.

The spelling of 257471 in words is "two hundred fifty-seven thousand, four hundred seventy-one".