312785 has 16 divisors (see below), whose sum is σ = 421632. Its totient is φ = 222640.

The previous prime is 312779. The next prime is 312799. The reversal of 312785 is 587213.

It is not a de Polignac number, because 312785 - 2¹⁶ = 247249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6632 + ... + 6678.

It is an arithmetic number, because the mean of its divisors is an integer number (26352).

2³¹²⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

312785 is a deficient number, since it is larger than the sum of its proper divisors (108847).

312785 is an equidigital number, since it uses as much as digits as its factorization.

312785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85 (or 63 counting only the distinct ones).

The product of its digits is 1680, while the sum is 26.

The square root of 312785 is about 559.2718480310. The cubic root of 312785 is about 67.8810637205.

Adding to 312785 its reverse (587213), we get a palindrome (899998).

The spelling of 312785 in words is "three hundred twelve thousand, seven hundred eighty-five".