1156987 has 8 divisors (see below), whose sum is σ = 1267280. Its totient is φ = 1049760.

The previous prime is 1156963. The next prime is 1156997. The reversal of 1156987 is 7896511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1156987 - 2¹⁵ = 1124219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1156907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64 + ... + 1522.

It is an arithmetic number, because the mean of its divisors is an integer number (158410).

2^1156987 is an apocalyptic number.

1156987 is a deficient number, since it is larger than the sum of its proper divisors (110293).

1156987 is a wasteful number, since it uses less digits than its factorization.

1156987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533.

The product of its digits is 15120, while the sum is 37.

The square root of 1156987 is about 1075.6333018273. The cubic root of 1156987 is about 104.9807069617.

The spelling of 1156987 in words is "one million, one hundred fifty-six thousand, nine hundred eighty-seven".