12225945 has 8 divisors (see below), whose sum is σ = 19561536. Its totient is φ = 6520496.

The previous prime is 12225937. The next prime is 12225989. The reversal of 12225945 is 54952221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12225945 - 2³ = 12225937 is a prime.

It is a super-2 number, since 2×12225945² = 298947462286050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407517 + ... + 407546.

It is an arithmetic number, because the mean of its divisors is an integer number (2445192).

Almost surely, 2^12225945 is an apocalyptic number.

12225945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12225945 is a deficient number, since it is larger than the sum of its proper divisors (7335591).

12225945 is an equidigital number, since it uses as much as digits as its factorization.

12225945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815071.

The product of its digits is 7200, while the sum is 30.

The square root of 12225945 is about 3496.5618827643. The cubic root of 12225945 is about 230.3708258717.

The spelling of 12225945 in words is "twelve million, two hundred twenty-five thousand, nine hundred forty-five".