1099801 has 4 divisors (see below), whose sum is σ = 1102900. Its totient is φ = 1096704.

The previous prime is 1099799. The next prime is 1099807. The reversal of 1099801 is 1089901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1089901 = 23 ⋅47387.

It can be written as a sum of positive squares in 2 ways, for example, as 491401 + 608400 = 701^2 + 780^2 .

It is a cyclic number.

It is not a de Polignac number, because 1099801 - 2¹ = 1099799 is a prime.

It is a Duffinian number.

1099801 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1099801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 936 + ... + 1753.

It is an arithmetic number, because the mean of its divisors is an integer number (275725).

2^1099801 is an apocalyptic number.

It is an amenable number.

1099801 is a deficient number, since it is larger than the sum of its proper divisors (3099).

1099801 is an equidigital number, since it uses as much as digits as its factorization.

1099801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3098.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 1099801 is about 1048.7139743514. The cubic root of 1099801 is about 103.2217862083.

The spelling of 1099801 in words is "one million, ninety-nine thousand, eight hundred one".