1318513 has 4 divisors (see below), whose sum is σ = 1506880. Its totient is φ = 1130148.

The previous prime is 1318489. The next prime is 1318517. The reversal of 1318513 is 3158131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1318513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1318517) 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, 94173 + ... + 94186.

It is an arithmetic number, because the mean of its divisors is an integer number (376720).

2^1318513 is an apocalyptic number.

It is an amenable number.

1318513 is a deficient number, since it is larger than the sum of its proper divisors (188367).

1318513 is an equidigital number, since it uses as much as digits as its factorization.

1318513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188366.

The product of its digits is 360, while the sum is 22.

The square root of 1318513 is about 1148.2652132674. The cubic root of 1318513 is about 109.6549241201.

It can be divided in two parts, 13185 and 13, that multiplied together give a triangular number (171405 = T₅₈₅).

The spelling of 1318513 in words is "one million, three hundred eighteen thousand, five hundred thirteen".