312745 has 4 divisors (see below), whose sum is σ = 375300. Its totient is φ = 250192.

The previous prime is 312743. The next prime is 312757. The reversal of 312745 is 547213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547213 = 17 ⋅32189.

It can be written as a sum of positive squares in 2 ways, for example, as 243049 + 69696 = 493^2 + 264^2 .

It is a cyclic number.

It is not a de Polignac number, because 312745 - 2¹ = 312743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (312743) 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, 31270 + ... + 31279.

It is an arithmetic number, because the mean of its divisors is an integer number (93825).

2³¹²⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

312745 is a deficient number, since it is larger than the sum of its proper divisors (62555).

312745 is an equidigital number, since it uses as much as digits as its factorization.

312745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62554.

The product of its digits is 840, while the sum is 22.

The square root of 312745 is about 559.2360861032. The cubic root of 312745 is about 67.8781699774.

Adding to 312745 its reverse (547213), we get a palindrome (859958).

It can be divided in two parts, 3127 and 45, that multiplied together give a triangular number (140715 = T₅₃₀).

The spelling of 312745 in words is "three hundred twelve thousand, seven hundred forty-five".