12222945 has 24 divisors (see below), whose sum is σ = 24213696. Its totient is φ = 5587488.

The previous prime is 12222943. The next prime is 12222967. The reversal of 12222945 is 54922221.

It is a happy number.

It is not a de Polignac number, because 12222945 - 2¹ = 12222943 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12222941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19087 + ... + 19716.

It is an arithmetic number, because the mean of its divisors is an integer number (1008904).

Almost surely, 2^12222945 is an apocalyptic number.

12222945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12222945 is a deficient number, since it is larger than the sum of its proper divisors (11990751).

12222945 is a wasteful number, since it uses less digits than its factorization.

12222945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38821 (or 38818 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 12222945 is about 3496.1328636080. The cubic root of 12222945 is about 230.3519815475.

The spelling of 12222945 in words is "twelve million, two hundred twenty-two thousand, nine hundred forty-five".