2102806 has 8 divisors (see below), whose sum is σ = 3320280. Its totient is φ = 996048.

The previous prime is 2102801. The next prime is 2102809. The reversal of 2102806 is 6082012.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102801) 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, 27631 + ... + 27706.

It is an arithmetic number, because the mean of its divisors is an integer number (415035).

2^2102806 is an apocalyptic number.

2102806 is a deficient number, since it is larger than the sum of its proper divisors (1217474).

2102806 is a wasteful number, since it uses less digits than its factorization.

2102806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55358.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 2102806 is about 1450.1055134024. The cubic root of 2102806 is about 128.1149277032.

Adding to 2102806 its reverse (6082012), we get a palindrome (8184818).

The spelling of 2102806 in words is "two million, one hundred two thousand, eight hundred six".