12226540 has 24 divisors (see below), whose sum is σ = 25759440. Its totient is φ = 4874688.

The previous prime is 12226537. The next prime is 12226549. The reversal of 12226540 is 4562221.

It is not an unprimeable number, because it can be changed into a prime (12226549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6774 + ... + 8386.

It is an arithmetic number, because the mean of its divisors is an integer number (1073310).

Almost surely, 2^12226540 is an apocalyptic number.

12226540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12226540 is an abundant number, since it is smaller than the sum of its proper divisors (13532900).

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

12226540 is a wasteful number, since it uses less digits than its factorization.

12226540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001 (or 1999 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 12226540 is about 3496.6469653083. The cubic root of 12226540 is about 230.3745629630.

Adding to 12226540 its reverse (4562221), we get a palindrome (16788761).

It can be divided in two parts, 122 and 26540, that added together give a palindrome (26662).

The spelling of 12226540 in words is "twelve million, two hundred twenty-six thousand, five hundred forty".