12341981 has 2 divisors, whose sum is σ = 12341982. Its totient is φ = 12341980.

The previous prime is 12341971. The next prime is 12342013. The reversal of 12341981 is 18914321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12313081 + 28900 = 3509^2 + 170^2 .

It is a cyclic number.

It is not a de Polignac number, because 12341981 - 2²² = 8147677 is a prime.

It is a super-2 number, since 2×12341981² = 304648990008722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12341941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6170990 + 6170991.

It is an arithmetic number, because the mean of its divisors is an integer number (6170991).

Almost surely, 2^12341981 is an apocalyptic number.

It is an amenable number.

12341981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12341981 is an equidigital number, since it uses as much as digits as its factorization.

12341981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 29.

The square root of 12341981 is about 3513.1155688363. The cubic root of 12341981 is about 231.0973459521.

The spelling of 12341981 in words is "twelve million, three hundred forty-one thousand, nine hundred eighty-one".