1155885 has 16 divisors (see below), whose sum is σ = 1862784. Its totient is φ = 612032.

The previous prime is 1155863. The next prime is 1155899. The reversal of 1155885 is 5885511.

It is a cyclic number.

It is not a de Polignac number, because 1155885 - 2⁶ = 1155821 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3799 + ... + 4091.

It is an arithmetic number, because the mean of its divisors is an integer number (116424).

2^1155885 is an apocalyptic number.

1155885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1155885 is a deficient number, since it is larger than the sum of its proper divisors (706899).

1155885 is a wasteful number, since it uses less digits than its factorization.

1155885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564.

The product of its digits is 8000, while the sum is 33.

The square root of 1155885 is about 1075.1209234314. The cubic root of 1155885 is about 104.9473659104.

The spelling of 1155885 in words is "one million, one hundred fifty-five thousand, eight hundred eighty-five".