12171392 has 16 divisors (see below), whose sum is σ = 24247950. Its totient is φ = 6085632.

The previous prime is 12171389. The next prime is 12171413. The reversal of 12171392 is 29317121.

It can be written as a sum of positive squares in only one way, i.e., 6677056 + 5494336 = 2584^2 + 2344^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47417 + ... + 47672.

Almost surely, 2^12171392 is an apocalyptic number.

It is an amenable number.

12171392 is a deficient number, since it is larger than the sum of its proper divisors (12076558).

12171392 is an frugal number, since it uses more digits than its factorization.

12171392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95103 (or 95091 counting only the distinct ones).

The product of its digits is 756, while the sum is 26.

The square root of 12171392 is about 3488.7522124679. The cubic root of 12171392 is about 230.0276715289.

The spelling of 12171392 in words is "twelve million, one hundred seventy-one thousand, three hundred ninety-two".