12225541 has 4 divisors (see below), whose sum is σ = 12241152. Its totient is φ = 12209932.

The previous prime is 12225527. The next prime is 12225553. The reversal of 12225541 is 14552221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12225541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12225041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6565 + ... + 8218.

It is an arithmetic number, because the mean of its divisors is an integer number (3060288).

Almost surely, 2^12225541 is an apocalyptic number.

It is an amenable number.

12225541 is a deficient number, since it is larger than the sum of its proper divisors (15611).

12225541 is an equidigital number, since it uses as much as digits as its factorization.

12225541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15610.

The product of its digits is 800, while the sum is 22.

The square root of 12225541 is about 3496.5041112517. The cubic root of 12225541 is about 230.3682883490.

Adding to 12225541 its reverse (14552221), we get a palindrome (26777762).

The spelling of 12225541 in words is "twelve million, two hundred twenty-five thousand, five hundred forty-one".