12805001 has 4 divisors (see below), whose sum is σ = 13969104. Its totient is φ = 11640900.

The previous prime is 12804983. The next prime is 12805007. The reversal of 12805001 is 10050821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12805001 - 2¹⁰ = 12803977 is a prime.

It is a super-2 number, since 2×12805001² = 327936101220002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12805007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 582035 + ... + 582056.

It is an arithmetic number, because the mean of its divisors is an integer number (3492276).

Almost surely, 2^12805001 is an apocalyptic number.

12805001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12805001 is a deficient number, since it is larger than the sum of its proper divisors (1164103).

12805001 is a wasteful number, since it uses less digits than its factorization.

12805001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164102.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 12805001 is about 3578.4076067435. The cubic root of 12805001 is about 233.9518797002.

Adding to 12805001 its reverse (10050821), we get a palindrome (22855822).

The spelling of 12805001 in words is "twelve million, eight hundred five thousand, one".