312487 has 4 divisors (see below), whose sum is σ = 357136. Its totient is φ = 267840.

The previous prime is 312469. The next prime is 312509. The reversal of 312487 is 784213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312487 - 2¹¹ = 310439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22314 + ... + 22327.

It is an arithmetic number, because the mean of its divisors is an integer number (89284).

2³¹²⁴⁸⁷ is an apocalyptic number.

312487 is a deficient number, since it is larger than the sum of its proper divisors (44649).

312487 is an equidigital number, since it uses as much as digits as its factorization.

312487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44648.

The product of its digits is 1344, while the sum is 25.

The square root of 312487 is about 559.0053667005. The cubic root of 312487 is about 67.8594994037.

The spelling of 312487 in words is "three hundred twelve thousand, four hundred eighty-seven".