1161918 has 16 divisors (see below), whose sum is σ = 2582160. Its totient is φ = 387288.

The previous prime is 1161893. The next prime is 1161929. The reversal of 1161918 is 8191611.

It is a Smith number, since the sum of its digits (27) 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 (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1161891 and 1161900.

It is a congruent number.

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, 10705 + ... + 10812.

It is an arithmetic number, because the mean of its divisors is an integer number (161385).

2^1161918 is an apocalyptic number.

1161918 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1161918 is an abundant number, since it is smaller than the sum of its proper divisors (1420242).

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

1161918 is a wasteful number, since it uses less digits than its factorization.

1161918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21528 (or 21522 counting only the distinct ones).

The product of its digits is 432, while the sum is 27.

The square root of 1161918 is about 1077.9230028161. The cubic root of 1161918 is about 105.1296358007.

1161918 divided by its sum of digits (27) gives a palindrome (43034).

The spelling of 1161918 in words is "one million, one hundred sixty-one thousand, nine hundred eighteen".