1099641 has 4 divisors (see below), whose sum is σ = 1466192. Its totient is φ = 733092.

The previous prime is 1099633. The next prime is 1099649. The reversal of 1099641 is 1469901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1099633) and next prime (1099649).

It is not a de Polignac number, because 1099641 - 2³ = 1099633 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1099599 and 1099608.

It is not an unprimeable number, because it can be changed into a prime (1099649) 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, 183271 + ... + 183276.

It is an arithmetic number, because the mean of its divisors is an integer number (366548).

2^1099641 is an apocalyptic number.

It is an amenable number.

1099641 is a deficient number, since it is larger than the sum of its proper divisors (366551).

1099641 is an equidigital number, since it uses as much as digits as its factorization.

1099641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366550.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1099641 is about 1048.6376876691. The cubic root of 1099641 is about 103.2167803673.

The spelling of 1099641 in words is "one million, ninety-nine thousand, six hundred forty-one".