1180989 has 6 divisors (see below), whose sum is σ = 1705886. Its totient is φ = 787320.

The previous prime is 1180987. The next prime is 1180997. The reversal of 1180989 is 9890811.

It can be written as a sum of positive squares in only one way, i.e., 1172889 + 8100 = 1083^2 + 90^2 .

It is not a de Polignac number, because 1180989 - 2¹ = 1180987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1180987) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65602 + ... + 65619.

2^1180989 is an apocalyptic number.

It is an amenable number.

1180989 is a deficient number, since it is larger than the sum of its proper divisors (524897).

1180989 is a wasteful number, since it uses less digits than its factorization.

1180989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131227 (or 131224 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 1180989 is about 1086.7331779236. The cubic root of 1180989 is about 105.7016948203.

The spelling of 1180989 in words is "one million, one hundred eighty thousand, nine hundred eighty-nine".