12717861 has 8 divisors (see below), whose sum is σ = 18261600. Its totient is φ = 7826352.

The previous prime is 12717857. The next prime is 12717869. The reversal of 12717861 is 16871721.

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

It is not a de Polignac number, because 12717861 - 2² = 12717857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12717869) 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, 163011 + ... + 163088.

It is an arithmetic number, because the mean of its divisors is an integer number (2282700).

Almost surely, 2^12717861 is an apocalyptic number.

It is an amenable number.

12717861 is a deficient number, since it is larger than the sum of its proper divisors (5543739).

12717861 is a wasteful number, since it uses less digits than its factorization.

12717861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326115.

The product of its digits is 4704, while the sum is 33.

The square root of 12717861 is about 3566.2110145083. The cubic root of 12717861 is about 233.4199784791.

The spelling of 12717861 in words is "twelve million, seven hundred seventeen thousand, eight hundred sixty-one".