312645 has 16 divisors (see below), whose sum is σ = 527040. Its totient is φ = 157824.

The previous prime is 312643. The next prime is 312673. The reversal of 312645 is 546213.

It is a happy number.

It is not a de Polignac number, because 312645 - 2¹ = 312643 is a prime.

It is a d-powerful number, because it can be written as 3¹¹ + 1 + 6⁴ + 2¹⁷ + 4 + 5⁵ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264 + ... + 833.

It is an arithmetic number, because the mean of its divisors is an integer number (32940).

2³¹²⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

312645 is a deficient number, since it is larger than the sum of its proper divisors (214395).

312645 is a wasteful number, since it uses less digits than its factorization.

312645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124.

The product of its digits is 720, while the sum is 21.

The square root of 312645 is about 559.1466712769. The cubic root of 312645 is about 67.8709345401.

Adding to 312645 its reverse (546213), we get a palindrome (858858).

The spelling of 312645 in words is "three hundred twelve thousand, six hundred forty-five".