12992161 has 8 divisors (see below), whose sum is σ = 15990464. Its totient is φ = 10279440.

The previous prime is 12992159. The next prime is 12992179. The reversal of 12992161 is 16129921.

12992161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12992161 - 2¹ = 12992159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12992101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71295 + ... + 71476.

It is an arithmetic number, because the mean of its divisors is an integer number (1998808).

Almost surely, 2^12992161 is an apocalyptic number.

It is an amenable number.

12992161 is a deficient number, since it is larger than the sum of its proper divisors (2998303).

12992161 is a wasteful number, since it uses less digits than its factorization.

12992161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142791.

The product of its digits is 1944, while the sum is 31.

The square root of 12992161 is about 3604.4640378286. The cubic root of 12992161 is about 235.0861974420.

The spelling of 12992161 in words is "twelve million, nine hundred ninety-two thousand, one hundred sixty-one".