41985981 has 6 divisors (see below), whose sum is σ = 60646430. Its totient is φ = 27990648.

The previous prime is 41985973. The next prime is 41985989. The reversal of 41985981 is 18958914.

41985981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (41985973) and next prime (41985989).

It can be written as a sum of positive squares in only one way, i.e., 22325625 + 19660356 = 4725^2 + 4434^2 .

It is not a de Polignac number, because 41985981 - 2³ = 41985973 is a prime.

It is a super-2 number, since 2×41985981² = 3525645201064722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41985989) 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 5 ways as a sum of consecutive naturals, for example, 2332546 + ... + 2332563.

Almost surely, 2^41985981 is an apocalyptic number.

It is an amenable number.

41985981 is a deficient number, since it is larger than the sum of its proper divisors (18660449).

41985981 is a wasteful number, since it uses less digits than its factorization.

41985981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4665115 (or 4665112 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 41985981 is about 6479.6590188065. The cubic root of 41985981 is about 347.5639852502.

The spelling of 41985981 in words is "forty-one million, nine hundred eighty-five thousand, nine hundred eighty-one".