12471881 has 2 divisors, whose sum is σ = 12471882. Its totient is φ = 12471880.

The previous prime is 12471871. The next prime is 12471883. The reversal of 12471881 is 18817421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10758400 + 1713481 = 3280^2 + 1309^2 .

It is a cyclic number.

It is not a de Polignac number, because 12471881 - 2¹⁴ = 12455497 is a prime.

It is a super-2 number, since 2×12471881² = 311095631356322, which contains 22 as substring.

Together with 12471883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12471883) 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 as a sum of consecutive naturals, namely, 6235940 + 6235941.

It is an arithmetic number, because the mean of its divisors is an integer number (6235941).

Almost surely, 2^12471881 is an apocalyptic number.

It is an amenable number.

12471881 is a deficient number, since it is larger than the sum of its proper divisors (1).

12471881 is an equidigital number, since it uses as much as digits as its factorization.

12471881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3584, while the sum is 32.

The square root of 12471881 is about 3531.5550399222. Note that the first 3 decimals coincide. The cubic root of 12471881 is about 231.9052885798.

The spelling of 12471881 in words is "twelve million, four hundred seventy-one thousand, eight hundred eighty-one".