318645 has 24 divisors (see below), whose sum is σ = 565656. Its totient is φ = 165888.

The previous prime is 318641. The next prime is 318653. The reversal of 318645 is 546813.

318645 is a `hidden beast` number, since 3 + 18 + 645 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 33489 + 285156 = 183^2 + 534^2 .

It is not a de Polignac number, because 318645 - 2² = 318641 is a prime.

It is a Curzon number.

318645 is a lucky number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3237 + ... + 3333.

It is an arithmetic number, because the mean of its divisors is an integer number (23569).

2³¹⁸⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

318645 is a deficient number, since it is larger than the sum of its proper divisors (247011).

318645 is a wasteful number, since it uses less digits than its factorization.

318645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 178 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 318645 is about 564.4864923096. The cubic root of 318645 is about 68.3023588881.

The spelling of 318645 in words is "three hundred eighteen thousand, six hundred forty-five".