1161203200 has 120 divisors (see below), whose sum is σ = 2914297848. Its totient is φ = 458465280.

The previous prime is 1161203179. The next prime is 1161203201. The reversal of 1161203200 is 23021611.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161203201) by changing a digit.

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, 1061854 + ... + 1062946.

Almost surely, 2^1161203200 is an apocalyptic number.

1161203200 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 1161203200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1457148924).

1161203200 is an abundant number, since it is smaller than the sum of its proper divisors (1753094648).

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

1161203200 is an equidigital number, since it uses as much as digits as its factorization.

1161203200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204 (or 1183 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1161203200 is about 34076.4317380796. The cubic root of 1161203200 is about 1051.0807315491.

Adding to 1161203200 its reverse (23021611), we get a palindrome (1184224811).

The spelling of 1161203200 in words is "one billion, one hundred sixty-one million, two hundred three thousand, two hundred".