2441920721 has 4 divisors (see below), whose sum is σ = 2445528372. Its totient is φ = 2438313072.

The previous prime is 2441920711. The next prime is 2441920729. The reversal of 2441920721 is 1270291442.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2356617025 + 85303696 = 48545^2 + 9236^2 .

It is a cyclic number.

It is not a de Polignac number, because 2441920721 - 2¹⁸ = 2441658577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2441920729) 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, 1802810 + ... + 1804163.

It is an arithmetic number, because the mean of its divisors is an integer number (611382093).

Almost surely, 2^2441920721 is an apocalyptic number.

It is an amenable number.

2441920721 is a deficient number, since it is larger than the sum of its proper divisors (3607651).

2441920721 is an equidigital number, since it uses as much as digits as its factorization.

2441920721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3607650.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 2441920721 is about 49415.7942463743. The cubic root of 2441920721 is about 1346.6162575961.

The spelling of 2441920721 in words is "two billion, four hundred forty-one million, nine hundred twenty thousand, seven hundred twenty-one".