1199043855 has 24 divisors (see below), whose sum is σ = 2082513888. Its totient is φ = 638206656.

The previous prime is 1199043829. The next prime is 1199043871. The reversal of 1199043855 is 5583409911.

It is not a de Polignac number, because 1199043855 - 2⁹ = 1199043343 is a prime.

It is a super-2 number, since 2×1199043855² = 2875412332426522050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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 1199043855.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3852 + ... + 49121.

It is an arithmetic number, because the mean of its divisors is an integer number (86771412).

Almost surely, 2^1199043855 is an apocalyptic number.

1199043855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1199043855 is a deficient number, since it is larger than the sum of its proper divisors (883470033).

1199043855 is a wasteful number, since it uses less digits than its factorization.

1199043855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53487 (or 53484 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The square root of 1199043855 is about 34627.2126368843. The cubic root of 1199043855 is about 1062.3762565000.

The spelling of 1199043855 in words is "one billion, one hundred ninety-nine million, forty-three thousand, eight hundred fifty-five".