12612278 has 16 divisors (see below), whose sum is σ = 21669120. Its totient is φ = 5393256.

The previous prime is 12612277. The next prime is 12612289. The reversal of 12612278 is 87221621.

It is a self number, because there is not a number n which added to its sum of digits gives 12612278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12612277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8903 + ... + 10221.

It is an arithmetic number, because the mean of its divisors is an integer number (1354320).

Almost surely, 2^12612278 is an apocalyptic number.

12612278 is a deficient number, since it is larger than the sum of its proper divisors (9056842).

12612278 is a wasteful number, since it uses less digits than its factorization.

12612278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011.

The product of its digits is 2688, while the sum is 29.

The square root of 12612278 is about 3551.3769160707. The cubic root of 12612278 is about 232.7722359358.

Adding to 12612278 its reverse (87221621), we get a palindrome (99833899).

The spelling of 12612278 in words is "twelve million, six hundred twelve thousand, two hundred seventy-eight".