12540163 has 4 divisors (see below), whose sum is σ = 12630520. Its totient is φ = 12449808.

The previous prime is 12540149. The next prime is 12540167. The reversal of 12540163 is 36104521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12540163 - 2¹⁷ = 12409091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12540167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44970 + ... + 45247.

It is an arithmetic number, because the mean of its divisors is an integer number (3157630).

Almost surely, 2^12540163 is an apocalyptic number.

12540163 is a deficient number, since it is larger than the sum of its proper divisors (90357).

12540163 is an equidigital number, since it uses as much as digits as its factorization.

12540163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90356.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 12540163 is about 3541.2092567370. The cubic root of 12540163 is about 232.3277361200.

Adding to 12540163 its reverse (36104521), we get a palindrome (48644684).

The spelling of 12540163 in words is "twelve million, five hundred forty thousand, one hundred sixty-three".