12678567 has 32 divisors (see below), whose sum is σ = 19749120. Its totient is φ = 7153920.

The previous prime is 12678563. The next prime is 12678571. The reversal of 12678567 is 76587621.

It is an interprime number because it is at equal distance from previous prime (12678563) and next prime (12678571).

It is not a de Polignac number, because 12678567 - 2² = 12678563 is a prime.

It is a super-2 number, since 2×12678567² = 321492122346978, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12678563) 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 31 ways as a sum of consecutive naturals, for example, 45633 + ... + 45909.

It is an arithmetic number, because the mean of its divisors is an integer number (617160).

Almost surely, 2^12678567 is an apocalyptic number.

12678567 is a deficient number, since it is larger than the sum of its proper divisors (7070553).

12678567 is a wasteful number, since it uses less digits than its factorization.

12678567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383.

The product of its digits is 141120, while the sum is 42.

The square root of 12678567 is about 3560.6975440214. The cubic root of 12678567 is about 233.1793335300.

The spelling of 12678567 in words is "twelve million, six hundred seventy-eight thousand, five hundred sixty-seven".