12978441 has 16 divisors (see below), whose sum is σ = 21974400. Its totient is φ = 7416144.

The previous prime is 12978431. The next prime is 12978467. The reversal of 12978441 is 14487921.

It is not a de Polignac number, because 12978441 - 2⁵ = 12978409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12978396 and 12978405.

It is not an unprimeable number, because it can be changed into a prime (12978401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34146 + ... + 34523.

It is an arithmetic number, because the mean of its divisors is an integer number (1373400).

Almost surely, 2^12978441 is an apocalyptic number.

It is an amenable number.

12978441 is a deficient number, since it is larger than the sum of its proper divisors (8995959).

12978441 is an equidigital number, since it uses as much as digits as its factorization.

12978441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68685 (or 68679 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 12978441 is about 3602.5603395363. The cubic root of 12978441 is about 235.0034162775.

The spelling of 12978441 in words is "twelve million, nine hundred seventy-eight thousand, four hundred forty-one".