12340981 has 2 divisors, whose sum is σ = 12340982. Its totient is φ = 12340980.

The previous prime is 12340969. The next prime is 12341009. The reversal of 12340981 is 18904321.

It is a happy number.

It is an a-pointer prime, because the next prime (12341009) can be obtained adding 12340981 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11764900 + 576081 = 3430^2 + 759^2 .

It is a cyclic number.

It is not a de Polignac number, because 12340981 - 2⁹ = 12340469 is a prime.

It is a super-2 number, since 2×12340981² = 304599624084722, 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 (12340901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6170490 + 6170491.

It is an arithmetic number, because the mean of its divisors is an integer number (6170491).

Almost surely, 2^12340981 is an apocalyptic number.

It is an amenable number.

12340981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12340981 is an equidigital number, since it uses as much as digits as its factorization.

12340981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 12340981 is about 3512.9732421412. The cubic root of 12340981 is about 231.0911042856.

The spelling of 12340981 in words is "twelve million, three hundred forty thousand, nine hundred eighty-one".