1138842 has 24 divisors (see below), whose sum is σ = 2489760. Its totient is φ = 376200.

The previous prime is 1138831. The next prime is 1138849. The reversal of 1138842 is 2488311.

It is a super-2 number, since 2×1138842² = 2593922201928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1138849) 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, 2509 + ... + 2927.

It is an arithmetic number, because the mean of its divisors is an integer number (103740).

2^1138842 is an apocalyptic number.

1138842 is an abundant number, since it is smaller than the sum of its proper divisors (1350918).

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

1138842 is a wasteful number, since it uses less digits than its factorization.

1138842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578 (or 575 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 1138842 is about 1067.1654042369. The cubic root of 1138842 is about 104.4290094221.

The spelling of 1138842 in words is "one million, one hundred thirty-eight thousand, eight hundred forty-two".