12299220 has 36 divisors (see below), whose sum is σ = 37308180. Its totient is φ = 3279744.

The previous prime is 12299201. The next prime is 12299237. The reversal of 12299220 is 2299221.

It can be written as a sum of positive squares in 2 ways, for example, as 8749764 + 3549456 = 2958^2 + 1884^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33985 + ... + 34344.

Almost surely, 2^12299220 is an apocalyptic number.

12299220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12299220 is an abundant number, since it is smaller than the sum of its proper divisors (25008960).

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

12299220 is a wasteful number, since it uses less digits than its factorization.

12299220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68344 (or 68339 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 12299220 is about 3507.0243797271. The cubic root of 12299220 is about 230.8301444327.

Subtracting from 12299220 its reverse (2299221), we obtain a palindrome (9999999).

The spelling of 12299220 in words is "twelve million, two hundred ninety-nine thousand, two hundred twenty".