41428721 has 6 divisors (see below), whose sum is σ = 43724322. Its totient is φ = 39247920.

The previous prime is 41428697. The next prime is 41428757. The reversal of 41428721 is 12782414.

41428721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 21492496 + 19936225 = 4636^2 + 4465^2 .

It is not a de Polignac number, because 41428721 - 2¹⁸ = 41166577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41428921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 57020 + ... + 57741.

It is an arithmetic number, because the mean of its divisors is an integer number (7287387).

Almost surely, 2^41428721 is an apocalyptic number.

It is an amenable number.

41428721 is a deficient number, since it is larger than the sum of its proper divisors (2295601).

41428721 is a wasteful number, since it uses less digits than its factorization.

41428721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114799 (or 114780 counting only the distinct ones).

The product of its digits is 3584, while the sum is 29.

The square root of 41428721 is about 6436.5146624551. The cubic root of 41428721 is about 346.0194477135.

The spelling of 41428721 in words is "forty-one million, four hundred twenty-eight thousand, seven hundred twenty-one".