1091404 has 12 divisors (see below), whose sum is σ = 1918728. Its totient is φ = 543200.

The previous prime is 1091401. The next prime is 1091411. The reversal of 1091404 is 4041901.

It is not an unprimeable number, because it can be changed into a prime (1091401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 639 + ... + 1609.

It is an arithmetic number, because the mean of its divisors is an integer number (159894).

2^1091404 is an apocalyptic number.

It is an amenable number.

1091404 is a deficient number, since it is larger than the sum of its proper divisors (827324).

1091404 is a wasteful number, since it uses less digits than its factorization.

1091404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256 (or 1254 counting only the distinct ones).

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

The square root of 1091404 is about 1044.7028285594. The cubic root of 1091404 is about 102.9584147330.

The spelling of 1091404 in words is "one million, ninety-one thousand, four hundred four".