41646721 has 8 divisors (see below), whose sum is σ = 43550784. Its totient is φ = 39750480.

The previous prime is 41646701. The next prime is 41646739. The reversal of 41646721 is 12764614.

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 41646721 - 2¹⁵ = 41613953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41646701) 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, 10770 + ... + 14116.

It is an arithmetic number, because the mean of its divisors is an integer number (5443848).

Almost surely, 2^41646721 is an apocalyptic number.

It is an amenable number.

41646721 is a deficient number, since it is larger than the sum of its proper divisors (1904063).

41646721 is a wasteful number, since it uses less digits than its factorization.

41646721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3911.

The product of its digits is 8064, while the sum is 31.

The square root of 41646721 is about 6453.4270740437. The cubic root of 41646721 is about 346.6253101347.

The spelling of 41646721 in words is "forty-one million, six hundred forty-six thousand, seven hundred twenty-one".