2664921 has 16 divisors (see below), whose sum is σ = 4275200. Its totient is φ = 1442448.

The previous prime is 2664911. The next prime is 2664923. The reversal of 2664921 is 1294662.

2664921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2664921 - 2⁵ = 2664889 is a prime.

It is a Duffinian number.

It is a Curzon number.

2664921 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2664923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2941 + ... + 3738.

It is an arithmetic number, because the mean of its divisors is an integer number (267200).

2^2664921 is an apocalyptic number.

2664921 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2664921 is a deficient number, since it is larger than the sum of its proper divisors (1610279).

2664921 is a wasteful number, since it uses less digits than its factorization.

2664921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6708.

The product of its digits is 5184, while the sum is 30.

The square root of 2664921 is about 1632.4585752784. The cubic root of 2664921 is about 138.6419888232.

The spelling of 2664921 in words is "two million, six hundred sixty-four thousand, nine hundred twenty-one".