1161123144 has 32 divisors (see below), whose sum is σ = 2903712000. Its totient is φ = 386920512.

The previous prime is 1161123121. The next prime is 1161123209. The reversal of 1161123144 is 4413211611.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106122 + ... + 116550.

It is an arithmetic number, because the mean of its divisors is an integer number (90741000).

Almost surely, 2^1161123144 is an apocalyptic number.

It is an amenable number.

1161123144 is an abundant number, since it is smaller than the sum of its proper divisors (1742588856).

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

1161123144 is a wasteful number, since it uses less digits than its factorization.

1161123144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15077 (or 15073 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 1161123144 is about 34075.2570643275. The cubic root of 1161123144 is about 1051.0565763588.

Adding to 1161123144 its reverse (4413211611), we get a palindrome (5574334755).

The spelling of 1161123144 in words is "one billion, one hundred sixty-one million, one hundred twenty-three thousand, one hundred forty-four".