312845 has 8 divisors (see below), whose sum is σ = 404376. Its totient is φ = 230976.

The previous prime is 312841. The next prime is 312857. The reversal of 312845 is 548213.

It can be written as a sum of positive squares in 4 ways, for example, as 20164 + 292681 = 142^2 + 541^2 .

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 312845 - 2² = 312841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2342 + ... + 2471.

It is an arithmetic number, because the mean of its divisors is an integer number (50547).

2³¹²⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

312845 is a deficient number, since it is larger than the sum of its proper divisors (91531).

312845 is a wasteful number, since it uses less digits than its factorization.

312845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4831.

The product of its digits is 960, while the sum is 23.

The square root of 312845 is about 559.3254866355. The cubic root of 312845 is about 67.8854038726.

The spelling of 312845 in words is "three hundred twelve thousand, eight hundred forty-five".