1155182985 has 32 divisors (see below), whose sum is σ = 2240357760. Its totient is φ = 560088000.

The previous prime is 1155182923. The next prime is 1155182999. The reversal of 1155182985 is 5892815511.

It is a happy number.

1155182985 is a `hidden beast` number, since 1 + 1 + 551 + 8 + 2 + 98 + 5 = 666.

It is not a de Polignac number, because 1155182985 - 2¹¹ = 1155180937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1155182985.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 387466 + ... + 390435.

It is an arithmetic number, because the mean of its divisors is an integer number (70011180).

Almost surely, 2^1155182985 is an apocalyptic number.

1155182985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1155182985 is a deficient number, since it is larger than the sum of its proper divisors (1085174775).

1155182985 is a wasteful number, since it uses less digits than its factorization.

1155182985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777926 (or 777920 counting only the distinct ones).

The product of its digits is 144000, while the sum is 45.

The square root of 1155182985 is about 33987.9829498604. The cubic root of 1155182985 is about 1049.2611536924.

The spelling of 1155182985 in words is "one billion, one hundred fifty-five million, one hundred eighty-two thousand, nine hundred eighty-five".