2081812 has 12 divisors (see below), whose sum is σ = 3679956. Its totient is φ = 1030400.

The previous prime is 2081809. The next prime is 2081813. The reversal of 2081812 is 2181802.

It can be written as a sum of positive squares in 2 ways, for example, as 1726596 + 355216 = 1314^2 + 596^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081813) 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, 2173 + ... + 2980.

It is an arithmetic number, because the mean of its divisors is an integer number (306663).

2^2081812 is an apocalyptic number.

It is an amenable number.

2081812 is a deficient number, since it is larger than the sum of its proper divisors (1598144).

2081812 is a wasteful number, since it uses less digits than its factorization.

2081812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5258 (or 5256 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 2081812 is about 1442.8485714031. The cubic root of 2081812 is about 127.6871428397.

The spelling of 2081812 in words is "two million, eighty-one thousand, eight hundred twelve".