12081971 has 12 divisors (see below), whose sum is σ = 13712832. Its totient is φ = 10626000.

The previous prime is 12081947. The next prime is 12081973. The reversal of 12081971 is 17918021.

It is a de Polignac number, because none of the positive numbers 2^k-12081971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12081973) 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 11 ways as a sum of consecutive naturals, for example, 2141 + ... + 5361.

It is an arithmetic number, because the mean of its divisors is an integer number (1142736).

Almost surely, 2^12081971 is an apocalyptic number.

12081971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12081971 is a deficient number, since it is larger than the sum of its proper divisors (1630861).

12081971 is a wasteful number, since it uses less digits than its factorization.

12081971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3274 (or 3263 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 12081971 is about 3475.9129735941. The cubic root of 12081971 is about 229.4629625237.

Adding to 12081971 its reverse (17918021), we get a palindrome (29999992).

The spelling of 12081971 in words is "twelve million, eighty-one thousand, nine hundred seventy-one".