1318998 has 16 divisors (see below), whose sum is σ = 2649600. Its totient is φ = 437736.

The previous prime is 1318997. The next prime is 1319023. The reversal of 1318998 is 8998131.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1903 + ... + 2501.

It is an arithmetic number, because the mean of its divisors is an integer number (165600).

2^1318998 is an apocalyptic number.

1318998 is an abundant number, since it is smaller than the sum of its proper divisors (1330602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1318998 is a wasteful number, since it uses less digits than its factorization.

1318998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971.

The product of its digits is 15552, while the sum is 39.

The square root of 1318998 is about 1148.4763819949. The cubic root of 1318998 is about 109.6683675772.

The spelling of 1318998 in words is "one million, three hundred eighteen thousand, nine hundred ninety-eight".