41805981 has 12 divisors (see below), whose sum is σ = 69013152. Its totient is φ = 23889096.

The previous prime is 41805979. The next prime is 41805997. The reversal of 41805981 is 18950814.

It is not a de Polignac number, because 41805981 - 2¹ = 41805979 is a prime.

It is a super-2 number, since 2×41805981² = 3495480094744722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41805901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 331731 + ... + 331856.

It is an arithmetic number, because the mean of its divisors is an integer number (5751096).

Almost surely, 2^41805981 is an apocalyptic number.

It is an amenable number.

41805981 is a deficient number, since it is larger than the sum of its proper divisors (27207171).

41805981 is a wasteful number, since it uses less digits than its factorization.

41805981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663600 (or 663597 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 41805981 is about 6465.7544803372. The cubic root of 41805981 is about 347.0665880013.

The spelling of 41805981 in words is "forty-one million, eight hundred five thousand, nine hundred eighty-one".