12801287 has 4 divisors (see below), whose sum is σ = 12918840. Its totient is φ = 12683736.

The previous prime is 12801259. The next prime is 12801293. The reversal of 12801287 is 78210821.

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

It is a cyclic number.

It is not a de Polignac number, because 12801287 - 2⁸ = 12801031 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 (12801247) 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, 58613 + ... + 58830.

It is an arithmetic number, because the mean of its divisors is an integer number (3229710).

Almost surely, 2^12801287 is an apocalyptic number.

12801287 is a deficient number, since it is larger than the sum of its proper divisors (117553).

12801287 is a wasteful number, since it uses less digits than its factorization.

12801287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117552.

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 12801287 is about 3577.8886231966. Note that the first 3 decimals coincide. The cubic root of 12801287 is about 233.9292588168.

The spelling of 12801287 in words is "twelve million, eight hundred one thousand, two hundred eighty-seven".