41781161 has 2 divisors, whose sum is σ = 41781162. Its totient is φ = 41781160.

The previous prime is 41781143. The next prime is 41781163. The reversal of 41781161 is 16118714.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41203561 + 577600 = 6419^2 + 760^2 .

It is a cyclic number.

It is not a de Polignac number, because 41781161 - 2⁶ = 41781097 is a prime.

Together with 41781163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (41781163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20890580 + 20890581.

It is an arithmetic number, because the mean of its divisors is an integer number (20890581).

Almost surely, 2^41781161 is an apocalyptic number.

It is an amenable number.

41781161 is a deficient number, since it is larger than the sum of its proper divisors (1).

41781161 is an equidigital number, since it uses as much as digits as its factorization.

41781161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 29.

The square root of 41781161 is about 6463.8348524695. The cubic root of 41781161 is about 346.9978905103.

Adding to 41781161 its reverse (16118714), we get a palindrome (57899875).

The spelling of 41781161 in words is "forty-one million, seven hundred eighty-one thousand, one hundred sixty-one".