2120806 has 4 divisors (see below), whose sum is σ = 3181212. Its totient is φ = 1060402.

The previous prime is 2120779. The next prime is 2120819. The reversal of 2120806 is 6080212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530200 + ... + 530203.

It is an arithmetic number, because the mean of its divisors is an integer number (795303).

2^2120806 is an apocalyptic number.

2120806 is a deficient number, since it is larger than the sum of its proper divisors (1060406).

2120806 is a wasteful number, since it uses less digits than its factorization.

2120806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060405.

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

The square root of 2120806 is about 1456.2987330902. The cubic root of 2120806 is about 128.4794437890.

It can be divided in two parts, 2120 and 806, that added together give a triangular number (2926 = T₇₆).

The spelling of 2120806 in words is "two million, one hundred twenty thousand, eight hundred six".