1161018 has 24 divisors (see below), whose sum is σ = 2565108. Its totient is φ = 379392.

The previous prime is 1161011. The next prime is 1161031. The reversal of 1161018 is 8101611.

It can be written as a sum of positive squares in 2 ways, for example, as 1159929 + 1089 = 1077^2 + 33^2 .

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1161011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 346 + ... + 1562.

2^1161018 is an apocalyptic number.

1161018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1161018 is an abundant number, since it is smaller than the sum of its proper divisors (1404090).

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

1161018 is a wasteful number, since it uses less digits than its factorization.

1161018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278 (or 1275 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

The square root of 1161018 is about 1077.5054524224. The cubic root of 1161018 is about 105.1024849713.

Adding to 1161018 its reverse (8101611), we get a palindrome (9262629).

It can be divided in two parts, 11610 and 18, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 1161018 in words is "one million, one hundred sixty-one thousand, eighteen".