12678522 has 8 divisors (see below), whose sum is σ = 25357056. Its totient is φ = 4226172.

The previous prime is 12678517. The next prime is 12678527. The reversal of 12678522 is 22587621.

It is an interprime number because it is at equal distance from previous prime (12678517) and next prime (12678527).

It is a sphenic number, since it is the product of 3 distinct primes.

12678522 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (12678527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056538 + ... + 1056549.

It is an arithmetic number, because the mean of its divisors is an integer number (3169632).

Almost surely, 2^12678522 is an apocalyptic number.

12678522 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12678522 is a wasteful number, since it uses less digits than its factorization.

12678522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113092.

The product of its digits is 13440, while the sum is 33.

The square root of 12678522 is about 3560.6912250292. The cubic root of 12678522 is about 233.1790576554.

Subtracting 12678522 from its reverse (22587621), we obtain a palindrome (9909099).

The spelling of 12678522 in words is "twelve million, six hundred seventy-eight thousand, five hundred twenty-two".