12540173 has 2 divisors, whose sum is σ = 12540174. Its totient is φ = 12540172.

The previous prime is 12540167. The next prime is 12540181. The reversal of 12540173 is 37104521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7171684 + 5368489 = 2678^2 + 2317^2 .

It is a cyclic number.

It is not a de Polignac number, because 12540173 - 2⁶ = 12540109 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12540973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6270086 + 6270087.

It is an arithmetic number, because the mean of its divisors is an integer number (6270087).

Almost surely, 2^12540173 is an apocalyptic number.

It is an amenable number.

12540173 is a deficient number, since it is larger than the sum of its proper divisors (1).

12540173 is an equidigital number, since it uses as much as digits as its factorization.

12540173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 12540173 is about 3541.2106686838. The cubic root of 12540173 is about 232.3277978756.

Adding to 12540173 its reverse (37104521), we get a palindrome (49644694).

The spelling of 12540173 in words is "twelve million, five hundred forty thousand, one hundred seventy-three".