1091842 has 12 divisors (see below), whose sum is σ = 1740690. Its totient is φ = 513536.

The previous prime is 1091837. The next prime is 1091843. The reversal of 1091842 is 2481901.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1079521 + 12321 = 1039^2 + 111^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091843) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 367 + ... + 1522.

2^1091842 is an apocalyptic number.

1091842 is a deficient number, since it is larger than the sum of its proper divisors (648848).

1091842 is a wasteful number, since it uses less digits than its factorization.

1091842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925 (or 1908 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1091842 is about 1044.9124365228. The cubic root of 1091842 is about 102.9721859104.

The spelling of 1091842 in words is "one million, ninety-one thousand, eight hundred forty-two".