12172288 has 22 divisors (see below), whose sum is σ = 24334736. Its totient is φ = 6085632.

The previous prime is 12172283. The next prime is 12172309. The reversal of 12172288 is 88227121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12172283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4920 + ... + 6967.

Almost surely, 2^12172288 is an apocalyptic number.

It is an amenable number.

12172288 is a deficient number, since it is larger than the sum of its proper divisors (12162448).

12172288 is an equidigital number, since it uses as much as digits as its factorization.

12172288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11907 (or 11889 counting only the distinct ones).

The product of its digits is 3584, while the sum is 31.

The square root of 12172288 is about 3488.8806227786. The cubic root of 12172288 is about 230.0333159048.

The spelling of 12172288 in words is "twelve million, one hundred seventy-two thousand, two hundred eighty-eight".