1099001 has 8 divisors (see below), whose sum is σ = 1142400. Its totient is φ = 1056528.

The previous prime is 1098989. The next prime is 1099031. The reversal of 1099001 is 1009901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1099001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1099031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2975 + ... + 3323.

It is an arithmetic number, because the mean of its divisors is an integer number (142800).

2^1099001 is an apocalyptic number.

It is an amenable number.

1099001 is a deficient number, since it is larger than the sum of its proper divisors (43399).

1099001 is an equidigital number, since it uses as much as digits as its factorization.

1099001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 1099001 is about 1048.3324854263. The cubic root of 1099001 is about 103.1967521462.

It can be divided in two parts, 109900 and 1, that added together give a palindrome (109901).

The spelling of 1099001 in words is "one million, ninety-nine thousand, one".