2120816 has 20 divisors (see below), whose sum is σ = 4161192. Its totient is φ = 1046976.

The previous prime is 2120779. The next prime is 2120819. The reversal of 2120816 is 6180212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530 + ... + 2126.

2^2120816 is an apocalyptic number.

It is an amenable number.

2120816 is a deficient number, since it is larger than the sum of its proper divisors (2040376).

2120816 is a wasteful number, since it uses less digits than its factorization.

2120816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688 (or 1682 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 2120816 is about 1456.3021664476. The cubic root of 2120816 is about 128.4796457236.

The spelling of 2120816 in words is "two million, one hundred twenty thousand, eight hundred sixteen".