12378851 has 2 divisors, whose sum is σ = 12378852. Its totient is φ = 12378850.

The previous prime is 12378841. The next prime is 12378859. The reversal of 12378851 is 15887321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12378851 - 2⁶ = 12378787 is a prime.

It is not a weakly prime, because it can be changed into another prime (12378859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6189425 + 6189426.

It is an arithmetic number, because the mean of its divisors is an integer number (6189426).

Almost surely, 2^12378851 is an apocalyptic number.

12378851 is a deficient number, since it is larger than the sum of its proper divisors (1).

12378851 is an equidigital number, since it uses as much as digits as its factorization.

12378851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 35.

The square root of 12378851 is about 3518.3591345967. The cubic root of 12378851 is about 231.3272412049.

The spelling of 12378851 in words is "twelve million, three hundred seventy-eight thousand, eight hundred fifty-one".