1169987 has 24 divisors (see below), whose sum is σ = 1545984. Its totient is φ = 864864.

The previous prime is 1169939. The next prime is 1170007. The reversal of 1169987 is 7899611.

It is a happy number.

It is not a de Polignac number, because 1169987 - 2¹⁸ = 907843 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 (1169587) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27188 + ... + 27230.

It is an arithmetic number, because the mean of its divisors is an integer number (64416).

2^1169987 is an apocalyptic number.

1169987 is a deficient number, since it is larger than the sum of its proper divisors (375997).

1169987 is a wasteful number, since it uses less digits than its factorization.

1169987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 86 counting only the distinct ones).

The product of its digits is 27216, while the sum is 41.

The square root of 1169987 is about 1081.6593733704. The cubic root of 1169987 is about 105.3724340318.

The spelling of 1169987 in words is "one million, one hundred sixty-nine thousand, nine hundred eighty-seven".