12285778 has 8 divisors (see below), whose sum is σ = 18448380. Its totient is φ = 6136320.

The previous prime is 12285731. The next prime is 12285797. The reversal of 12285778 is 87758221.

It can be written as a sum of positive squares in 2 ways, for example, as 12089529 + 196249 = 3477^2 + 443^2 .

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

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 12285778.

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, 463 + ... + 4978.

Almost surely, 2^12285778 is an apocalyptic number.

12285778 is a deficient number, since it is larger than the sum of its proper divisors (6162602).

12285778 is a wasteful number, since it uses less digits than its factorization.

12285778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6572.

The product of its digits is 62720, while the sum is 40.

The square root of 12285778 is about 3505.1074163283. The cubic root of 12285778 is about 230.7460212156.

The spelling of 12285778 in words is "twelve million, two hundred eighty-five thousand, seven hundred seventy-eight".