257485 has 8 divisors (see below), whose sum is σ = 322560. Its totient is φ = 196944.

The previous prime is 257473. The next prime is 257489. The reversal of 257485 is 584752.

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 257485 - 2¹⁵ = 224717 is a prime.

257485 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1005 + ... + 1234.

It is an arithmetic number, because the mean of its divisors is an integer number (40320).

2²⁵⁷⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

257485 is a deficient number, since it is larger than the sum of its proper divisors (65075).

257485 is a wasteful number, since it uses less digits than its factorization.

257485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267.

The product of its digits is 11200, while the sum is 31.

The square root of 257485 is about 507.4297981002. The cubic root of 257485 is about 63.6185809929.

The spelling of 257485 in words is "two hundred fifty-seven thousand, four hundred eighty-five".