1118161 has 6 divisors (see below), whose sum is σ = 1229186. Its totient is φ = 1016400.

The previous prime is 1118149. The next prime is 1118189. The reversal of 1118161 is 1618111.

It can be written as a sum of positive squares in only one way, i.e., 1115136 + 3025 = 1056^2 + 55^2 .

It is not a de Polignac number, because 1118161 - 2¹⁷ = 987089 is a prime.

It is a Duffinian number.

1118161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1118101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4500 + ... + 4741.

2^1118161 is an apocalyptic number.

1118161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1118161 is a deficient number, since it is larger than the sum of its proper divisors (111025).

1118161 is an equidigital number, since it uses as much as digits as its factorization.

1118161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9263 (or 9252 counting only the distinct ones).

The product of its digits is 48, while the sum is 19.

The square root of 1118161 is about 1057.4313216469. The cubic root of 1118161 is about 103.7930116335.

The spelling of 1118161 in words is "one million, one hundred eighteen thousand, one hundred sixty-one".