12225771 has 12 divisors (see below), whose sum is σ = 18698472. Its totient is φ = 7670976.

The previous prime is 12225769. The next prime is 12225779. The reversal of 12225771 is 17752221.

It is not a de Polignac number, because 12225771 - 2¹ = 12225769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12225779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39801 + ... + 40106.

It is an arithmetic number, because the mean of its divisors is an integer number (1558206).

Almost surely, 2^12225771 is an apocalyptic number.

12225771 is a deficient number, since it is larger than the sum of its proper divisors (6472701).

12225771 is a wasteful number, since it uses less digits than its factorization.

12225771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79930 (or 79927 counting only the distinct ones).

The product of its digits is 1960, while the sum is 27.

The square root of 12225771 is about 3496.5370010912. The cubic root of 12225771 is about 230.3697329852.

Adding to 12225771 its reverse (17752221), we get a palindrome (29977992).

It can be divided in two parts, 12225 and 771, that added together give a square (12996 = 114²).

The spelling of 12225771 in words is "twelve million, two hundred twenty-five thousand, seven hundred seventy-one".