1155087 has 16 divisors (see below), whose sum is σ = 1728000. Its totient is φ = 762552.

The previous prime is 1155071. The next prime is 1155097. The reversal of 1155087 is 7805511.

It is not a de Polignac number, because 1155087 - 2⁴ = 1155071 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

1155087 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1155087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4714 + ... + 4952.

It is an arithmetic number, because the mean of its divisors is an integer number (108000).

2^1155087 is an apocalyptic number.

1155087 is a deficient number, since it is larger than the sum of its proper divisors (572913).

1155087 is a wasteful number, since it uses less digits than its factorization.

1155087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 27.

The square root of 1155087 is about 1074.7497383112. The cubic root of 1155087 is about 104.9232091595.

The spelling of 1155087 in words is "one million, one hundred fifty-five thousand, eighty-seven".