12019871 has 2 divisors, whose sum is σ = 12019872. Its totient is φ = 12019870.

The previous prime is 12019849. The next prime is 12019873. The reversal of 12019871 is 17891021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12019871 - 2⁶ = 12019807 is a prime.

Together with 12019873, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12019873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6009935 + 6009936.

It is an arithmetic number, because the mean of its divisors is an integer number (6009936).

Almost surely, 2^12019871 is an apocalyptic number.

12019871 is a deficient number, since it is larger than the sum of its proper divisors (1).

12019871 is an equidigital number, since it uses as much as digits as its factorization.

12019871 is an odious number, because the sum of its binary digits is odd.

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

The square root of 12019871 is about 3466.9685605728. The cubic root of 12019871 is about 229.0691489148.

It can be divided in two parts, 120 and 19871, that added together give a palindrome (19991).

The spelling of 12019871 in words is "twelve million, nineteen thousand, eight hundred seventy-one".