985257 has 32 divisors (see below), whose sum is σ = 1800960. Its totient is φ = 518400.

The previous prime is 985253. The next prime is 985277. The reversal of 985257 is 752589.

It is not a de Polignac number, because 985257 - 2² = 985253 is a prime.

985257 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2257 + ... + 2657.

It is an arithmetic number, because the mean of its divisors is an integer number (56280).

2⁹⁸⁵²⁵⁷ is an apocalyptic number.

It is an amenable number.

985257 is a deficient number, since it is larger than the sum of its proper divisors (815703).

985257 is a wasteful number, since it uses less digits than its factorization.

985257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430 (or 424 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 985257 is about 992.6011283491. The cubic root of 985257 is about 99.5061316222.

The spelling of 985257 in words is "nine hundred eighty-five thousand, two hundred fifty-seven".