41641681 has 4 divisors (see below), whose sum is σ = 42143472. Its totient is φ = 41139892.

The previous prime is 41641679. The next prime is 41641739. The reversal of 41641681 is 18614614.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 41641681 - 2¹ = 41641679 is a prime.

It is a super-2 number, since 2×41641681² = 3468059193011522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41641601) 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, 250771 + ... + 250936.

It is an arithmetic number, because the mean of its divisors is an integer number (10535868).

Almost surely, 2^41641681 is an apocalyptic number.

It is an amenable number.

41641681 is a deficient number, since it is larger than the sum of its proper divisors (501791).

41641681 is an equidigital number, since it uses as much as digits as its factorization.

41641681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501790.

The product of its digits is 4608, while the sum is 31.

The square root of 41641681 is about 6453.0365720334. The cubic root of 41641681 is about 346.6113269447.

The spelling of 41641681 in words is "forty-one million, six hundred forty-one thousand, six hundred eighty-one".