41781 has 8 divisors (see below), whose sum is σ = 58720. Its totient is φ = 26352.

The previous prime is 41777. The next prime is 41801. The reversal of 41781 is 18714.

41781 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 41781 - 2² = 41777 is a prime.

It is a super-2 number, since 2×41781² = 3491303922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

41781 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41761) 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, 310 + ... + 423.

It is an arithmetic number, because the mean of its divisors is an integer number (7340).

2⁴¹⁷⁸¹ is an apocalyptic number.

It is an amenable number.

41781 is a deficient number, since it is larger than the sum of its proper divisors (16939).

41781 is a wasteful number, since it uses less digits than its factorization.

41781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755.

The product of its digits is 224, while the sum is 21.

The square root of 41781 is about 204.4040117023. The cubic root of 41781 is about 34.6997444801.

The spelling of 41781 in words is "forty-one thousand, seven hundred eighty-one".