12817901 has 4 divisors (see below), whose sum is σ = 12830172. Its totient is φ = 12805632.

The previous prime is 12817897. The next prime is 12817907. The reversal of 12817901 is 10971821.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5522500 + 7295401 = 2350^2 + 2701^2 .

It is a cyclic number.

It is not a de Polignac number, because 12817901 - 2² = 12817897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12817907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4406 + ... + 6711.

It is an arithmetic number, because the mean of its divisors is an integer number (3207543).

Almost surely, 2^12817901 is an apocalyptic number.

It is an amenable number.

12817901 is a deficient number, since it is larger than the sum of its proper divisors (12271).

12817901 is a wasteful number, since it uses less digits than its factorization.

12817901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12270.

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 12817901 is about 3580.2096307339. The cubic root of 12817901 is about 234.0304158481.

The spelling of 12817901 in words is "twelve million, eight hundred seventeen thousand, nine hundred one".