12141981 has 24 divisors (see below), whose sum is σ = 18826080. Its totient is φ = 7810992.

The previous prime is 12141979. The next prime is 12142001. The reversal of 12141981 is 18914121.

12141981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12141981 - 2¹ = 12141979 is a prime.

It is a super-2 number, since 2×12141981² = 294855405208722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12141901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6186 + ... + 7908.

It is an arithmetic number, because the mean of its divisors is an integer number (784420).

Almost surely, 2^12141981 is an apocalyptic number.

It is an amenable number.

12141981 is a deficient number, since it is larger than the sum of its proper divisors (6684099).

12141981 is an equidigital number, since it uses as much as digits as its factorization.

12141981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767 (or 1755 counting only the distinct ones).

The product of its digits is 576, while the sum is 27.

The square root of 12141981 is about 3484.5345456746. The cubic root of 12141981 is about 229.8422421646.

The spelling of 12141981 in words is "twelve million, one hundred forty-one thousand, nine hundred eighty-one".