257470 has 8 divisors (see below), whose sum is σ = 463464. Its totient is φ = 102984.

The previous prime is 257459. The next prime is 257473. The reversal of 257470 is 74752.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257473) by changing a digit.

257470 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12864 + ... + 12883.

It is an arithmetic number, because the mean of its divisors is an integer number (57933).

2²⁵⁷⁴⁷⁰ is an apocalyptic number.

257470 is a deficient number, since it is larger than the sum of its proper divisors (205994).

257470 is a wasteful number, since it uses less digits than its factorization.

257470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25754.

The product of its (nonzero) digits is 1960, while the sum is 25.

The square root of 257470 is about 507.4150175152. The cubic root of 257470 is about 63.6173455847.

It can be divided in two parts, 257 and 470, that added together give a palindrome (727).

The spelling of 257470 in words is "two hundred fifty-seven thousand, four hundred seventy".