312247 has 4 divisors (see below), whose sum is σ = 336280. Its totient is φ = 288216.

The previous prime is 312241. The next prime is 312251. The reversal of 312247 is 742213.

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 312247 - 2¹⁵ = 279479 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 (312241) 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, 11997 + ... + 12022.

It is an arithmetic number, because the mean of its divisors is an integer number (84070).

2³¹²²⁴⁷ is an apocalyptic number.

312247 is a deficient number, since it is larger than the sum of its proper divisors (24033).

312247 is a wasteful number, since it uses less digits than its factorization.

312247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24032.

The product of its digits is 336, while the sum is 19.

The square root of 312247 is about 558.7906584760. The cubic root of 312247 is about 67.8421221997.

It can be divided in two parts, 31 and 2247, that added together give a triangular number (2278 = T₆₇).

The spelling of 312247 in words is "three hundred twelve thousand, two hundred forty-seven", and thus it is an iban number.