12640117 has 8 divisors (see below), whose sum is σ = 14544000. Its totient is φ = 10760784.

The previous prime is 12640099. The next prime is 12640123. The reversal of 12640117 is 71104621.

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 12640117 - 2⁷ = 12639989 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 (12640217) 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, 5017 + ... + 7102.

It is an arithmetic number, because the mean of its divisors is an integer number (1818000).

Almost surely, 2^12640117 is an apocalyptic number.

It is an amenable number.

12640117 is a deficient number, since it is larger than the sum of its proper divisors (1903883).

12640117 is a wasteful number, since it uses less digits than its factorization.

12640117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12275.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 12640117 is about 3555.2942212987. The cubic root of 12640117 is about 232.9433756314.

Adding to 12640117 its reverse (71104621), we get a palindrome (83744738).

The spelling of 12640117 in words is "twelve million, six hundred forty thousand, one hundred seventeen".