318145 has 4 divisors (see below), whose sum is σ = 381780. Its totient is φ = 254512.

The previous prime is 318137. The next prime is 318161. The reversal of 318145 is 541813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541813 = 239 ⋅2267.

It can be written as a sum of positive squares in 2 ways, for example, as 118336 + 199809 = 344^2 + 447^2 .

It is a cyclic number.

It is not a de Polignac number, because 318145 - 2³ = 318137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31810 + ... + 31819.

It is an arithmetic number, because the mean of its divisors is an integer number (95445).

2³¹⁸¹⁴⁵ is an apocalyptic number.

It is an amenable number.

318145 is a deficient number, since it is larger than the sum of its proper divisors (63635).

318145 is an equidigital number, since it uses as much as digits as its factorization.

318145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63634.

The product of its digits is 480, while the sum is 22.

The square root of 318145 is about 564.0434380436. The cubic root of 318145 is about 68.2666147656.

Adding to 318145 its reverse (541813), we get a palindrome (859958).

The spelling of 318145 in words is "three hundred eighteen thousand, one hundred forty-five".