2159812 has 12 divisors (see below), whose sum is σ = 3836560. Its totient is φ = 1063656.

The previous prime is 2159809. The next prime is 2159819. The reversal of 2159812 is 2189512.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2159819) 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, 3762 + ... + 4297.

2^2159812 is an apocalyptic number.

It is an amenable number.

2159812 is a deficient number, since it is larger than the sum of its proper divisors (1676748).

2159812 is a wasteful number, since it uses less digits than its factorization.

2159812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8130 (or 8128 counting only the distinct ones).

The product of its digits is 1440, while the sum is 28.

The square root of 2159812 is about 1469.6298853793. The cubic root of 2159812 is about 129.2623309809.

The spelling of 2159812 in words is "two million, one hundred fifty-nine thousand, eight hundred twelve".