315745 has 4 divisors (see below), whose sum is σ = 378900. Its totient is φ = 252592.

The previous prime is 315743. The next prime is 315751. The reversal of 315745 is 547513.

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

It can be written as a sum of positive squares in 2 ways, for example, as 96721 + 219024 = 311^2 + 468^2 .

It is a cyclic number.

It is not a de Polignac number, because 315745 - 2¹ = 315743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (315743) 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, 31570 + ... + 31579.

It is an arithmetic number, because the mean of its divisors is an integer number (94725).

2³¹⁵⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

315745 is a deficient number, since it is larger than the sum of its proper divisors (63155).

315745 is an equidigital number, since it uses as much as digits as its factorization.

315745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63154.

The product of its digits is 2100, while the sum is 25.

The square root of 315745 is about 561.9119148052. The cubic root of 315745 is about 68.0945196530.

It can be divided in two parts, 31 and 5745, that added together give a square (5776 = 76²).

The spelling of 315745 in words is "three hundred fifteen thousand, seven hundred forty-five".