1091442 has 32 divisors (see below), whose sum is σ = 2488320. Its totient is φ = 315920.

The previous prime is 1091413. The next prime is 1091443. The reversal of 1091442 is 2441901.

It is not an unprimeable number, because it can be changed into a prime (1091443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1159 + ... + 1877.

It is an arithmetic number, because the mean of its divisors is an integer number (77760).

2^1091442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1091442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1244160).

1091442 is an abundant number, since it is smaller than the sum of its proper divisors (1396878).

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

1091442 is a wasteful number, since it uses less digits than its factorization.

1091442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1091442 is about 1044.7210153912. The cubic root of 1091442 is about 102.9596096386.

It can be divided in two parts, 109 and 1442, that added together give a palindrome (1551).

The spelling of 1091442 in words is "one million, ninety-one thousand, four hundred forty-two".