2041721 has 8 divisors (see below), whose sum is σ = 2344800. Its totient is φ = 1758240.

The previous prime is 2041709. The next prime is 2041729. The reversal of 2041721 is 1271402.

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

It is a de Polignac number, because none of the positive numbers 2^k-2041721 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 2041721.

It is not an unprimeable number, because it can be changed into a prime (2041729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4676 + ... + 5093.

It is an arithmetic number, because the mean of its divisors is an integer number (293100).

2^2041721 is an apocalyptic number.

It is an amenable number.

2041721 is a deficient number, since it is larger than the sum of its proper divisors (303079).

2041721 is a wasteful number, since it uses less digits than its factorization.

2041721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9799.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 2041721 is about 1428.8880292031. Note that the first 3 decimals coincide. The cubic root of 2041721 is about 126.8621688594.

The spelling of 2041721 in words is "two million, forty-one thousand, seven hundred twenty-one".