12225545 has 16 divisors (see below), whose sum is σ = 15187392. Its totient is φ = 9441600.

The previous prime is 12225527. The next prime is 12225553. The reversal of 12225545 is 54552221.

It is not a de Polignac number, because 12225545 - 2¹⁰ = 12224521 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21434 + ... + 21996.

It is an arithmetic number, because the mean of its divisors is an integer number (949212).

Almost surely, 2^12225545 is an apocalyptic number.

It is an amenable number.

12225545 is a deficient number, since it is larger than the sum of its proper divisors (2961847).

12225545 is a wasteful number, since it uses less digits than its factorization.

12225545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712.

The product of its digits is 4000, while the sum is 26.

The square root of 12225545 is about 3496.5046832515. The cubic root of 12225545 is about 230.3683134733.

Adding to 12225545 its reverse (54552221), we get a palindrome (66777766).

The spelling of 12225545 in words is "twelve million, two hundred twenty-five thousand, five hundred forty-five".