1155996 has 36 divisors (see below), whose sum is σ = 2954952. Its totient is φ = 381024.

The previous prime is 1155977. The next prime is 1155997. The reversal of 1155996 is 6995511.

1155996 is a `hidden beast` number, since 11 + 559 + 96 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1155996.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5770 + ... + 5966.

It is an arithmetic number, because the mean of its divisors is an integer number (82082).

2^1155996 is an apocalyptic number.

It is an amenable number.

1155996 is an abundant number, since it is smaller than the sum of its proper divisors (1798956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155996 is a wasteful number, since it uses less digits than its factorization.

1155996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 365 counting only the distinct ones).

The product of its digits is 12150, while the sum is 36.

The square root of 1155996 is about 1075.1725442923. The cubic root of 1155996 is about 104.9507251791.

Subtracting from 1155996 its sum of digits (36), we obtain a triangular number (1155960 = T₁₅₂₀).

The spelling of 1155996 in words is "one million, one hundred fifty-five thousand, nine hundred ninety-six".