1179987 has 12 divisors (see below), whose sum is σ = 1672536. Its totient is φ = 739840.

The previous prime is 1179979. The next prime is 1179989. The reversal of 1179987 is 7899711.

It is a happy number.

It is not a de Polignac number, because 1179987 - 2³ = 1179979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1179989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187 + ... + 1547.

It is an arithmetic number, because the mean of its divisors is an integer number (139378).

2^1179987 is an apocalyptic number.

1179987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1179987 is a deficient number, since it is larger than the sum of its proper divisors (492549).

1179987 is a wasteful number, since it uses less digits than its factorization.

1179987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398 (or 1381 counting only the distinct ones).

The product of its digits is 31752, while the sum is 42.

The square root of 1179987 is about 1086.2720653685. The cubic root of 1179987 is about 105.6717924628.

The spelling of 1179987 in words is "one million, one hundred seventy-nine thousand, nine hundred eighty-seven".