1155218974 has 32 divisors (see below), whose sum is σ = 2137121280. Its totient is φ = 456064992.

The previous prime is 1155218971. The next prime is 1155218989. The reversal of 1155218974 is 4798125511.

It is a super-2 number, since 2×1155218974² = 2669061755779225352, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1155218974.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155218971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85237 + ... + 97855.

It is an arithmetic number, because the mean of its divisors is an integer number (66785040).

Almost surely, 2^1155218974 is an apocalyptic number.

1155218974 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1155218974 is a deficient number, since it is larger than the sum of its proper divisors (981902306).

1155218974 is a wasteful number, since it uses less digits than its factorization.

1155218974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13144.

The product of its digits is 100800, while the sum is 43.

The square root of 1155218974 is about 33988.5123828625. The cubic root of 1155218974 is about 1049.2720499366.

The spelling of 1155218974 in words is "one billion, one hundred fifty-five million, two hundred eighteen thousand, nine hundred seventy-four".