312385 has 4 divisors (see below), whose sum is σ = 374868. Its totient is φ = 249904.

The previous prime is 312383. The next prime is 312397. The reversal of 312385 is 583213.

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 82944 + 229441 = 288^2 + 479^2 .

It is a cyclic number.

It is not a de Polignac number, because 312385 - 2¹ = 312383 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 (312383) 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, 31234 + ... + 31243.

It is an arithmetic number, because the mean of its divisors is an integer number (93717).

2³¹²³⁸⁵ is an apocalyptic number.

It is an amenable number.

312385 is a deficient number, since it is larger than the sum of its proper divisors (62483).

312385 is an equidigital number, since it uses as much as digits as its factorization.

312385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62482.

The product of its digits is 720, while the sum is 22.

The square root of 312385 is about 558.9141257832. The cubic root of 312385 is about 67.8521151795.

Adding to 312385 its reverse (583213), we get a palindrome (895598).

The spelling of 312385 in words is "three hundred twelve thousand, three hundred eighty-five".