12531173 has 4 divisors (see below), whose sum is σ = 12600588. Its totient is φ = 12461760.

The previous prime is 12531163. The next prime is 12531191. The reversal of 12531173 is 37113521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37113521 = 4243 ⋅8747.

It can be written as a sum of positive squares in 2 ways, for example, as 6543364 + 5987809 = 2558^2 + 2447^2 .

It is a cyclic number.

It is not a de Polignac number, because 12531173 - 2¹⁰ = 12530149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12531133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34436 + ... + 34797.

It is an arithmetic number, because the mean of its divisors is an integer number (3150147).

Almost surely, 2^12531173 is an apocalyptic number.

It is an amenable number.

12531173 is a deficient number, since it is larger than the sum of its proper divisors (69415).

12531173 is an equidigital number, since it uses as much as digits as its factorization.

12531173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69414.

The product of its digits is 630, while the sum is 23.

The square root of 12531173 is about 3539.9396887518. The cubic root of 12531173 is about 232.2722045277.

Adding to 12531173 its reverse (37113521), we get a palindrome (49644694).

The spelling of 12531173 in words is "twelve million, five hundred thirty-one thousand, one hundred seventy-three".