1118691 has 20 divisors (see below), whose sum is σ = 1910832. Its totient is φ = 638928.

The previous prime is 1118659. The next prime is 1118713. The reversal of 1118691 is 1968111.

It is not a de Polignac number, because 1118691 - 2⁵ = 1118659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1118291) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 420 + ... + 1553.

2^1118691 is an apocalyptic number.

1118691 is a deficient number, since it is larger than the sum of its proper divisors (792141).

1118691 is an equidigital number, since it uses as much as digits as its factorization.

1118691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992 (or 1983 counting only the distinct ones).

The product of its digits is 432, while the sum is 27.

The square root of 1118691 is about 1057.6818992495. The cubic root of 1118691 is about 103.8094080817.

The spelling of 1118691 in words is "one million, one hundred eighteen thousand, six hundred ninety-one".