12245778 has 12 divisors (see below), whose sum is σ = 26532558. Its totient is φ = 4081920.

The previous prime is 12245767. The next prime is 12245819. The reversal of 12245778 is 87754221.

It can be written as a sum of positive squares in only one way, i.e., 7436529 + 4809249 = 2727^2 + 2193^2 .

It is a plaindrome in base 10.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 340143 + ... + 340178.

Almost surely, 2^12245778 is an apocalyptic number.

12245778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12245778 is an abundant number, since it is smaller than the sum of its proper divisors (14286780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12245778 is a wasteful number, since it uses less digits than its factorization.

12245778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680329 (or 680326 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 12245778 is about 3499.3968051651. The cubic root of 12245778 is about 230.4953282101.

Adding to 12245778 its reverse (87754221), we get a palindrome (99999999).

The spelling of 12245778 in words is "twelve million, two hundred forty-five thousand, seven hundred seventy-eight".