2040721 has 8 divisors (see below), whose sum is σ = 2157120. Its totient is φ = 1926672.

The previous prime is 2040719. The next prime is 2040743. The reversal of 2040721 is 1270402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2040721 - 2¹ = 2040719 is a prime.

It is a Duffinian number.

2040721 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2040695 and 2040704.

It is not an unprimeable number, because it can be changed into a prime (2040781) 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 7 ways as a sum of consecutive naturals, for example, 1375 + ... + 2443.

It is an arithmetic number, because the mean of its divisors is an integer number (269640).

2^2040721 is an apocalyptic number.

It is an amenable number.

2040721 is a deficient number, since it is larger than the sum of its proper divisors (116399).

2040721 is a wasteful number, since it uses less digits than its factorization.

2040721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 2040721 is about 1428.5380638961. The cubic root of 2040721 is about 126.8414538374.

The spelling of 2040721 in words is "two million, forty thousand, seven hundred twenty-one".