12540517 has 8 divisors (see below), whose sum is σ = 13874112. Its totient is φ = 11239200.

The previous prime is 12540503. The next prime is 12540529. The reversal of 12540517 is 71504521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12540517 - 2⁷ = 12540389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12540491 and 12540500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12540217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7248 + ... + 8809.

It is an arithmetic number, because the mean of its divisors is an integer number (1734264).

Almost surely, 2^12540517 is an apocalyptic number.

It is an amenable number.

12540517 is a deficient number, since it is larger than the sum of its proper divisors (1333595).

12540517 is a wasteful number, since it uses less digits than its factorization.

12540517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16139.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 12540517 is about 3541.2592393102. The cubic root of 12540517 is about 232.3299222491.

The spelling of 12540517 in words is "twelve million, five hundred forty thousand, five hundred seventeen".