12478855 has 4 divisors (see below), whose sum is σ = 14974632. Its totient is φ = 9983080.

The previous prime is 12478849. The next prime is 12478859. The reversal of 12478855 is 55887421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55887421 = 5821 ⋅9601.

It is not a de Polignac number, because 12478855 - 2⁷ = 12478727 is a prime.

It is a super-2 number, since 2×12478855² = 311443644222050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12478859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1247881 + ... + 1247890.

It is an arithmetic number, because the mean of its divisors is an integer number (3743658).

Almost surely, 2^12478855 is an apocalyptic number.

12478855 is a deficient number, since it is larger than the sum of its proper divisors (2495777).

12478855 is an equidigital number, since it uses as much as digits as its factorization.

12478855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495776.

The product of its digits is 89600, while the sum is 40.

The square root of 12478855 is about 3532.5422856634. The cubic root of 12478855 is about 231.9485059614.

The spelling of 12478855 in words is "twelve million, four hundred seventy-eight thousand, eight hundred fifty-five".