1109445 has 16 divisors (see below), whose sum is σ = 1824000. Its totient is φ = 575424.

The previous prime is 1109431. The next prime is 1109473. The reversal of 1109445 is 5449011.

It is not a de Polignac number, because 1109445 - 2⁸ = 1109189 is a prime.

1109445 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 445 + ... + 1554.

It is an arithmetic number, because the mean of its divisors is an integer number (114000).

2^1109445 is an apocalyptic number.

1109445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1109445 is a deficient number, since it is larger than the sum of its proper divisors (714555).

1109445 is a wasteful number, since it uses less digits than its factorization.

1109445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2044.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1109445 is about 1053.3019510093. The cubic root of 1109445 is about 103.5226210212.

The spelling of 1109445 in words is "one million, one hundred nine thousand, four hundred forty-five".