312671 has 4 divisors (see below), whose sum is σ = 315552. Its totient is φ = 309792.

The previous prime is 312643. The next prime is 312673. The reversal of 312671 is 176213.

It is a happy number.

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 312671 - 2¹⁴ = 296287 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 (312673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1271 + ... + 1496.

It is an arithmetic number, because the mean of its divisors is an integer number (78888).

2³¹²⁶⁷¹ is an apocalyptic number.

312671 is a deficient number, since it is larger than the sum of its proper divisors (2881).

312671 is a wasteful number, since it uses less digits than its factorization.

312671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2880.

The product of its digits is 252, while the sum is 20.

The square root of 312671 is about 559.1699205072. The cubic root of 312671 is about 67.8728159022.

Adding to 312671 its reverse (176213), we get a palindrome (488884).

The spelling of 312671 in words is "three hundred twelve thousand, six hundred seventy-one".