41721881 has 2 divisors, whose sum is σ = 41721882. Its totient is φ = 41721880.

The previous prime is 41721871. The next prime is 41721907. The reversal of 41721881 is 18812714.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27920656 + 13801225 = 5284^2 + 3715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41721881 is a prime.

It is a super-2 number, since 2×41721881² = 3481430708356322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (41721811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20860940 + 20860941.

It is an arithmetic number, because the mean of its divisors is an integer number (20860941).

Almost surely, 2^41721881 is an apocalyptic number.

It is an amenable number.

41721881 is a deficient number, since it is larger than the sum of its proper divisors (1).

41721881 is an equidigital number, since it uses as much as digits as its factorization.

41721881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3584, while the sum is 32.

The square root of 41721881 is about 6459.2477116147. The cubic root of 41721881 is about 346.8337035057.

The spelling of 41721881 in words is "forty-one million, seven hundred twenty-one thousand, eight hundred eighty-one".