1156988 has 18 divisors (see below), whose sum is σ = 2355696. Its totient is φ = 495768.

The previous prime is 1156963. The next prime is 1156997. The reversal of 1156988 is 8896511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2756 + ... + 3147.

It is an arithmetic number, because the mean of its divisors is an integer number (130872).

2^1156988 is an apocalyptic number.

It is an amenable number.

1156988 is an abundant number, since it is smaller than the sum of its proper divisors (1198708).

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

1156988 is a wasteful number, since it uses less digits than its factorization.

1156988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5921 (or 5912 counting only the distinct ones).

The product of its digits is 17280, while the sum is 38.

The square root of 1156988 is about 1075.6337666697. The cubic root of 1156988 is about 104.9807372071.

The spelling of 1156988 in words is "one million, one hundred fifty-six thousand, nine hundred eighty-eight".