12915173 has 4 divisors (see below), whose sum is σ = 13043148. Its totient is φ = 12787200.

The previous prime is 12915169. The next prime is 12915187. The reversal of 12915173 is 37151921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37151921 = 193 ⋅192497.

It can be written as a sum of positive squares in 2 ways, for example, as 11950849 + 964324 = 3457^2 + 982^2 .

It is a cyclic number.

It is not a de Polignac number, because 12915173 - 2² = 12915169 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12915163) 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 3 ways as a sum of consecutive naturals, for example, 63836 + ... + 64037.

It is an arithmetic number, because the mean of its divisors is an integer number (3260787).

Almost surely, 2^12915173 is an apocalyptic number.

It is an amenable number.

12915173 is a deficient number, since it is larger than the sum of its proper divisors (127975).

12915173 is a wasteful number, since it uses less digits than its factorization.

12915173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127974.

The product of its digits is 1890, while the sum is 29.

The square root of 12915173 is about 3593.7686347343. The cubic root of 12915173 is about 234.6209249885.

The spelling of 12915173 in words is "twelve million, nine hundred fifteen thousand, one hundred seventy-three".