1091224 has 8 divisors (see below), whose sum is σ = 2046060. Its totient is φ = 545608.

The previous prime is 1091221. The next prime is 1091239. The reversal of 1091224 is 4221901.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68194 + ... + 68209.

2^1091224 is an apocalyptic number.

It is an amenable number.

1091224 is a deficient number, since it is larger than the sum of its proper divisors (954836).

1091224 is a wasteful number, since it uses less digits than its factorization.

1091224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136409 (or 136405 counting only the distinct ones).

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

The square root of 1091224 is about 1044.6166761066. The cubic root of 1091224 is about 102.9527542768.

The spelling of 1091224 in words is "one million, ninety-one thousand, two hundred twenty-four".