1118661 has 8 divisors (see below), whose sum is σ = 1497984. Its totient is φ = 742560.

The previous prime is 1118659. The next prime is 1118713. The reversal of 1118661 is 1668111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1118661 - 2¹ = 1118659 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180 + ... + 1506.

It is an arithmetic number, because the mean of its divisors is an integer number (187248).

2^1118661 is an apocalyptic number.

It is an amenable number.

1118661 is a deficient number, since it is larger than the sum of its proper divisors (379323).

1118661 is a wasteful number, since it uses less digits than its factorization.

1118661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611.

The product of its digits is 288, while the sum is 24.

The square root of 1118661 is about 1057.6677171967. The cubic root of 1118661 is about 103.8084801192.

The spelling of 1118661 in words is "one million, one hundred eighteen thousand, six hundred sixty-one".