1091424 has 24 divisors (see below), whose sum is σ = 2865240. Its totient is φ = 363776.

The previous prime is 1091413. The next prime is 1091443. The reversal of 1091424 is 4241901.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-3 number, since 3×1091424³ = 3900333590745219072, which contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1091424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5589 + ... + 5780.

It is an arithmetic number, because the mean of its divisors is an integer number (119385).

2^1091424 is an apocalyptic number.

It is an amenable number.

1091424 is an abundant number, since it is smaller than the sum of its proper divisors (1773816).

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

1091424 is a wasteful number, since it uses less digits than its factorization.

1091424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11382 (or 11374 counting only the distinct ones).

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

The square root of 1091424 is about 1044.7124006156. The cubic root of 1091424 is about 102.9590436342.

The spelling of 1091424 in words is "one million, ninety-one thousand, four hundred twenty-four".