312087 has 8 divisors (see below), whose sum is σ = 434304. Its totient is φ = 198968.

The previous prime is 312083. The next prime is 312089. The reversal of 312087 is 780213.

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 312087 - 2² = 312083 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 312087.

It is not an unprimeable number, because it can be changed into a prime (312083) 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, 2193 + ... + 2330.

It is an arithmetic number, because the mean of its divisors is an integer number (54288).

2³¹²⁰⁸⁷ is an apocalyptic number.

312087 is a deficient number, since it is larger than the sum of its proper divisors (122217).

312087 is a wasteful number, since it uses less digits than its factorization.

312087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4549.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 312087 is about 558.6474738151. The cubic root of 312087 is about 67.8305324495.

It can be divided in two parts, 3 and 12087, that added together give a triangular number (12090 = T₁₅₅).

The spelling of 312087 in words is "three hundred twelve thousand, eighty-seven".