1161900 has 54 divisors (see below), whose sum is σ = 3644732. Its totient is φ = 309600.

The previous prime is 1161893. The next prime is 1161929. The reversal of 1161900 is 91611.

It is a super-2 number, since 2×1161900² = 2700023220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 17 ways as a sum of consecutive naturals, for example, 255 + ... + 1545.

2^1161900 is an apocalyptic number.

1161900 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 1161900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1822366).

1161900 is an abundant number, since it is smaller than the sum of its proper divisors (2482832).

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

1161900 is a wasteful number, since it uses less digits than its factorization.

1161900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311 (or 1301 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 1161900 is about 1077.9146533933. The cubic root of 1161900 is about 105.1290929215.

It can be divided in two parts, 116 and 1900, that added together give a triangular number (2016 = T₆₃).

The spelling of 1161900 in words is "one million, one hundred sixty-one thousand, nine hundred".