1091242 has 4 divisors (see below), whose sum is σ = 1636866. Its totient is φ = 545620.

The previous prime is 1091239. The next prime is 1091243. The reversal of 1091242 is 2421901.

1091242 is nontrivially palindromic in base 5.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 962361 + 128881 = 981^2 + 359^2 .

It is not an unprimeable number, because it can be changed into a prime (1091243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272809 + ... + 272812.

2^1091242 is an apocalyptic number.

1091242 is a deficient number, since it is larger than the sum of its proper divisors (545624).

1091242 is an equidigital number, since it uses as much as digits as its factorization.

1091242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545623.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1091242 is about 1044.6252916716. The cubic root of 1091242 is about 102.9533203505.

The spelling of 1091242 in words is "one million, ninety-one thousand, two hundred forty-two".