12478451 has 2 divisors, whose sum is σ = 12478452. Its totient is φ = 12478450.

The previous prime is 12478409. The next prime is 12478457. The reversal of 12478451 is 15487421.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12478451 - 2⁶ = 12478387 is a prime.

It is not a weakly prime, because it can be changed into another prime (12478457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6239225 + 6239226.

It is an arithmetic number, because the mean of its divisors is an integer number (6239226).

Almost surely, 2^12478451 is an apocalyptic number.

12478451 is a deficient number, since it is larger than the sum of its proper divisors (1).

12478451 is an equidigital number, since it uses as much as digits as its factorization.

12478451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8960, while the sum is 32.

The square root of 12478451 is about 3532.4851025871. The cubic root of 12478451 is about 231.9460028416.

The spelling of 12478451 in words is "twelve million, four hundred seventy-eight thousand, four hundred fifty-one".