1099447 has 4 divisors (see below), whose sum is σ = 1103776. Its totient is φ = 1095120.

The previous prime is 1099433. The next prime is 1099459. The reversal of 1099447 is 7449901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7449901 = 857 ⋅8693.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1099447 is a prime.

It is a Duffinian number.

1099447 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099487) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1758 + ... + 2299.

It is an arithmetic number, because the mean of its divisors is an integer number (275944).

2^1099447 is an apocalyptic number.

1099447 is a deficient number, since it is larger than the sum of its proper divisors (4329).

1099447 is an equidigital number, since it uses as much as digits as its factorization.

1099447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4328.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1099447 is about 1048.5451826221. The cubic root of 1099447 is about 103.2107101338.

The spelling of 1099447 in words is "one million, ninety-nine thousand, four hundred forty-seven".