12205678 has 8 divisors (see below), whose sum is σ = 18324360. Its totient is φ = 6097560.

The previous prime is 12205649. The next prime is 12205691. The reversal of 12205678 is 87650221.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1633 + ... + 5203.

It is an arithmetic number, because the mean of its divisors is an integer number (2290545).

Almost surely, 2^12205678 is an apocalyptic number.

12205678 is a deficient number, since it is larger than the sum of its proper divisors (6118682).

12205678 is a wasteful number, since it uses less digits than its factorization.

12205678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5282.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 12205678 is about 3493.6625481005. The cubic root of 12205678 is about 230.2434599079.

Adding to 12205678 its reverse (87650221), we get a palindrome (99855899).

The spelling of 12205678 in words is "twelve million, two hundred five thousand, six hundred seventy-eight".