12456671 has 2 divisors, whose sum is σ = 12456672. Its totient is φ = 12456670.

The previous prime is 12456667. The next prime is 12456673. The reversal of 12456671 is 17665421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12456671 - 2² = 12456667 is a prime.

Together with 12456673, 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 (12456673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6228335 + 6228336.

It is an arithmetic number, because the mean of its divisors is an integer number (6228336).

Almost surely, 2^12456671 is an apocalyptic number.

12456671 is a deficient number, since it is larger than the sum of its proper divisors (1).

12456671 is an equidigital number, since it uses as much as digits as its factorization.

12456671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 32.

The square root of 12456671 is about 3529.4009406697. The cubic root of 12456671 is about 231.8109773768.

The spelling of 12456671 in words is "twelve million, four hundred fifty-six thousand, six hundred seventy-one".