1109745 has 48 divisors (see below), whose sum is σ = 2376192. Its totient is φ = 466560.

The previous prime is 1109737. The next prime is 1109749. The reversal of 1109745 is 5479011.

It is not a de Polignac number, because 1109745 - 2³ = 1109737 is a prime.

It is a Curzon number.

1109745 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1109749) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3960 + ... + 4230.

It is an arithmetic number, because the mean of its divisors is an integer number (49504).

2^1109745 is an apocalyptic number.

1109745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1109745 is an abundant number, since it is smaller than the sum of its proper divisors (1266447).

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

1109745 is a wasteful number, since it uses less digits than its factorization.

1109745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 1109745 is about 1053.4443506897. Note that the first 3 decimals coincide. The cubic root of 1109745 is about 103.5319512080.

It can be divided in two parts, 1 and 109745, that added together give a triangular number (109746 = T₄₆₈).

The spelling of 1109745 in words is "one million, one hundred nine thousand, seven hundred forty-five".