1109142 has 24 divisors (see below), whose sum is σ = 2460744. Its totient is φ = 360864.

The previous prime is 1109123. The next prime is 1109159. The reversal of 1109142 is 2419011.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58 + ... + 1490.

It is an arithmetic number, because the mean of its divisors is an integer number (102531).

2^1109142 is an apocalyptic number.

1109142 is an abundant number, since it is smaller than the sum of its proper divisors (1351602).

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

1109142 is a wasteful number, since it uses less digits than its factorization.

1109142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484 (or 1481 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1109142 is about 1053.1581077882. The cubic root of 1109142 is about 103.5131958250.

The spelling of 1109142 in words is "one million, one hundred nine thousand, one hundred forty-two".