312842 has 4 divisors (see below), whose sum is σ = 469266. Its totient is φ = 156420.

The previous prime is 312841. The next prime is 312857. The reversal of 312842 is 248213.

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

It can be written as a sum of positive squares in only one way, i.e., 312481 + 361 = 559^2 + 19^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 312842.

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78209 + ... + 78212.

2³¹²⁸⁴² is an apocalyptic number.

312842 is a deficient number, since it is larger than the sum of its proper divisors (156424).

312842 is a wasteful number, since it uses less digits than its factorization.

312842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156423.

The product of its digits is 384, while the sum is 20.

The square root of 312842 is about 559.3228048274. The cubic root of 312842 is about 67.8851868782.

The spelling of 312842 in words is "three hundred twelve thousand, eight hundred forty-two".