670257 has 12 divisors (see below), whose sum is σ = 1106560. Its totient is φ = 382968.

The previous prime is 670249. The next prime is 670261. The reversal of 670257 is 752076.

It is not a de Polignac number, because 670257 - 2³ = 670249 is a prime.

It is an Ulam number.

670257 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 670257.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 670257.

It is not an unprimeable number, because it can be changed into a prime (670217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5257 + ... + 5382.

2⁶⁷⁰²⁵⁷ is an apocalyptic number.

It is an amenable number.

670257 is a deficient number, since it is larger than the sum of its proper divisors (436303).

670257 is a wasteful number, since it uses less digits than its factorization.

670257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10652 (or 10649 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 670257 is about 818.6922498717. The cubic root of 670257 is about 87.5145880439.

The spelling of 670257 in words is "six hundred seventy thousand, two hundred fifty-seven".