41607721 has 16 divisors (see below), whose sum is σ = 46826640. Its totient is φ = 36771840.

The previous prime is 41607719. The next prime is 41607751. The reversal of 41607721 is 12770614.

41607721 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 8 ways, for example, as 7502121 + 34105600 = 2739^2 + 5840^2 .

It is a 4-Lehmer number, since φ(41607721) divides (41607721-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 41607721 - 2¹ = 41607719 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 41607721.

It is not an unprimeable number, because it can be changed into a prime (41607751) 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 15 ways as a sum of consecutive naturals, for example, 17101 + ... + 19381.

It is an arithmetic number, because the mean of its divisors is an integer number (2926665).

It is a Poulet number, since it divides 2^41607720-1.

Almost surely, 2^41607721 is an apocalyptic number.

It is an amenable number.

41607721 is a deficient number, since it is larger than the sum of its proper divisors (5218919).

41607721 is a wasteful number, since it uses less digits than its factorization.

41607721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2364.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 41607721 is about 6450.4047159849. The cubic root of 41607721 is about 346.5170774517.

It can be divided in two parts, 4160 and 7721, that added together give a square (11881 = 109²).

The spelling of 41607721 in words is "forty-one million, six hundred seven thousand, seven hundred twenty-one".