1116639 has 8 divisors (see below), whose sum is σ = 1654320. Its totient is φ = 744408.

The previous prime is 1116637. The next prime is 1116641. The reversal of 1116639 is 9366111.

1116639 is a `hidden beast` number, since 11 + 16 + 639 = 666.

It is an interprime number because it is at equal distance from previous prime (1116637) and next prime (1116641).

It is not a de Polignac number, because 1116639 - 2¹ = 1116637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 41357 = 1116639 / (1 + 1 + 1 + 6 + 6 + 3 + 9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1116631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20652 + ... + 20705.

It is an arithmetic number, because the mean of its divisors is an integer number (206790).

2^1116639 is an apocalyptic number.

1116639 is a deficient number, since it is larger than the sum of its proper divisors (537681).

1116639 is an equidigital number, since it uses as much as digits as its factorization.

1116639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41366 (or 41360 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 1116639 is about 1056.7114080959. The cubic root of 1116639 is about 103.7458971620.

The spelling of 1116639 in words is "one million, one hundred sixteen thousand, six hundred thirty-nine".