2012921 has 4 divisors (see below), whose sum is σ = 2041344. Its totient is φ = 1984500.

The previous prime is 2012909. The next prime is 2012951. The reversal of 2012921 is 1292102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2012921 - 2¹⁰ = 2011897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2012921.

It is not an unprimeable number, because it can be changed into a prime (2012951) 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, 14105 + ... + 14246.

It is an arithmetic number, because the mean of its divisors is an integer number (510336).

2^2012921 is an apocalyptic number.

It is an amenable number.

2012921 is a deficient number, since it is larger than the sum of its proper divisors (28423).

2012921 is an equidigital number, since it uses as much as digits as its factorization.

2012921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28422.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 2012921 is about 1418.7744711546. The cubic root of 2012921 is about 126.2628467795.

The spelling of 2012921 in words is "two million, twelve thousand, nine hundred twenty-one".