12478819 has 2 divisors, whose sum is σ = 12478820. Its totient is φ = 12478818.

The previous prime is 12478813. The next prime is 12478849. The reversal of 12478819 is 91887421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12478819 - 2¹¹ = 12476771 is a prime.

It is a super-2 number, since 2×12478819² = 311441847269522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12478813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6239409 + 6239410.

It is an arithmetic number, because the mean of its divisors is an integer number (6239410).

Almost surely, 2^12478819 is an apocalyptic number.

12478819 is a deficient number, since it is larger than the sum of its proper divisors (1).

12478819 is an equidigital number, since it uses as much as digits as its factorization.

12478819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 40.

The square root of 12478819 is about 3532.5371901793. The cubic root of 12478819 is about 231.9482829133.

The spelling of 12478819 in words is "twelve million, four hundred seventy-eight thousand, eight hundred nineteen".