1173987 has 8 divisors (see below), whose sum is σ = 1739280. Its totient is φ = 782640.

The previous prime is 1173983. The next prime is 1174021. The reversal of 1173987 is 7893711.

It is not a de Polignac number, because 1173987 - 2² = 1173983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1173983) 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, 21714 + ... + 21767.

It is an arithmetic number, because the mean of its divisors is an integer number (217410).

2^1173987 is an apocalyptic number.

1173987 is a deficient number, since it is larger than the sum of its proper divisors (565293).

1173987 is an equidigital number, since it uses as much as digits as its factorization.

1173987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43490 (or 43484 counting only the distinct ones).

The product of its digits is 10584, while the sum is 36.

The square root of 1173987 is about 1083.5068066238. The cubic root of 1173987 is about 105.4923813221.

The spelling of 1173987 in words is "one million, one hundred seventy-three thousand, nine hundred eighty-seven".