1318749 has 4 divisors (see below), whose sum is σ = 1758336. Its totient is φ = 879164.

The previous prime is 1318739. The next prime is 1318753. The reversal of 1318749 is 9478131.

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 not a de Polignac number, because 1318749 - 2¹⁵ = 1285981 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318729) 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, 219789 + ... + 219794.

It is an arithmetic number, because the mean of its divisors is an integer number (439584).

2^1318749 is an apocalyptic number.

It is an amenable number.

1318749 is a deficient number, since it is larger than the sum of its proper divisors (439587).

1318749 is an equidigital number, since it uses as much as digits as its factorization.

1318749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439586.

The product of its digits is 6048, while the sum is 33.

The square root of 1318749 is about 1148.3679723852. The cubic root of 1318749 is about 109.6614660903.

The spelling of 1318749 in words is "one million, three hundred eighteen thousand, seven hundred forty-nine".