41129981 has 2 divisors, whose sum is σ = 41129982. Its totient is φ = 41129980.

The previous prime is 41129971. The next prime is 41129989. The reversal of 41129981 is 18992114.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22562500 + 18567481 = 4750^2 + 4309^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41129981 is a prime.

It is a super-2 number, since 2×41129981² = 3383350674120722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41129989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20564990 + 20564991.

It is an arithmetic number, because the mean of its divisors is an integer number (20564991).

Almost surely, 2^41129981 is an apocalyptic number.

It is an amenable number.

41129981 is a deficient number, since it is larger than the sum of its proper divisors (1).

41129981 is an equidigital number, since it uses as much as digits as its factorization.

41129981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 35.

The square root of 41129981 is about 6413.2660166252. The cubic root of 41129981 is about 345.1857321006.

The spelling of 41129981 in words is "forty-one million, one hundred twenty-nine thousand, nine hundred eighty-one".