12157173 has 12 divisors (see below), whose sum is σ = 20069088. Its totient is φ = 6946920.

The previous prime is 12157153. The next prime is 12157199. The reversal of 12157173 is 37175121.

It is a happy number.

12157173 is a `hidden beast` number, since 1 + 21 + 571 + 73 = 666.

12157173 is nontrivially palindromic in base 8.

12157173 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12157173 - 2⁵ = 12157141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12157153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96423 + ... + 96548.

It is an arithmetic number, because the mean of its divisors is an integer number (1672424).

Almost surely, 2^12157173 is an apocalyptic number.

It is an amenable number.

12157173 is a deficient number, since it is larger than the sum of its proper divisors (7911915).

12157173 is a wasteful number, since it uses less digits than its factorization.

12157173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192984 (or 192981 counting only the distinct ones).

The product of its digits is 1470, while the sum is 27.

The square root of 12157173 is about 3486.7137823458. The cubic root of 12157173 is about 229.9380614564.

The spelling of 12157173 in words is "twelve million, one hundred fifty-seven thousand, one hundred seventy-three".