312143 has 6 divisors (see below), whose sum is σ = 338184. Its totient is φ = 287976.

The previous prime is 312121. The next prime is 312161. The reversal of 312143 is 341213.

It is not a de Polignac number, because 312143 - 2¹⁴ = 295759 is a prime.

It is a Duffinian number.

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 312143.

It is not an unprimeable number, because it can be changed into a prime (312043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 755 + ... + 1092.

It is an arithmetic number, because the mean of its divisors is an integer number (56364).

2³¹²¹⁴³ is an apocalyptic number.

312143 is a deficient number, since it is larger than the sum of its proper divisors (26041).

312143 is a wasteful number, since it uses less digits than its factorization.

312143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873 (or 1860 counting only the distinct ones).

The product of its digits is 72, while the sum is 14.

The square root of 312143 is about 558.6975926206. The cubic root of 312143 is about 67.8345893126.

Adding to 312143 its reverse (341213), we get a palindrome (653356).

The spelling of 312143 in words is "three hundred twelve thousand, one hundred forty-three", and thus it is an iban number.