12278623 has 8 divisors (see below), whose sum is σ = 14057120. Its totient is φ = 10506240.

The previous prime is 12278611. The next prime is 12278633. The reversal of 12278623 is 32687221.

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

It is a cyclic number.

It is not a de Polignac number, because 12278623 - 2⁹ = 12278111 is a prime.

It is a super-2 number, since 2×12278623² = 301529165552258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12278633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4243 + ... + 6523.

It is an arithmetic number, because the mean of its divisors is an integer number (1757140).

Almost surely, 2^12278623 is an apocalyptic number.

12278623 is a deficient number, since it is larger than the sum of its proper divisors (1778497).

12278623 is an equidigital number, since it uses as much as digits as its factorization.

12278623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3057.

The product of its digits is 8064, while the sum is 31.

The square root of 12278623 is about 3504.0866142263. The cubic root of 12278623 is about 230.7012185073.

The spelling of 12278623 in words is "twelve million, two hundred seventy-eight thousand, six hundred twenty-three".