1155171200 has 96 divisors (see below), whose sum is σ = 2863443960. Its totient is φ = 460482560.

The previous prime is 1155171169. The next prime is 1155171211. The reversal of 1155171200 is 21715511.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1494014 + ... + 1494786.

Almost surely, 2^1155171200 is an apocalyptic number.

1155171200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155171200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1431721980).

1155171200 is an abundant number, since it is smaller than the sum of its proper divisors (1708272760).

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

1155171200 is an equidigital number, since it uses as much as digits as its factorization.

1155171200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264 (or 1247 counting only the distinct ones).

The product of its (nonzero) digits is 350, while the sum is 23.

The square root of 1155171200 is about 33987.8095793183. The cubic root of 1155171200 is about 1049.2575855464.

Adding to 1155171200 its reverse (21715511), we get a palindrome (1176886711).

The spelling of 1155171200 in words is "one billion, one hundred fifty-five million, one hundred seventy-one thousand, two hundred".