12872817 has 16 divisors (see below), whose sum is σ = 19145280. Its totient is φ = 8548416.

The previous prime is 12872809. The next prime is 12872831. The reversal of 12872817 is 71827821.

It is a happy number.

It is not a de Polignac number, because 12872817 - 2³ = 12872809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12872807) 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 15 ways as a sum of consecutive naturals, for example, 7513 + ... + 9065.

It is an arithmetic number, because the mean of its divisors is an integer number (1196580).

Almost surely, 2^12872817 is an apocalyptic number.

It is an amenable number.

12872817 is a deficient number, since it is larger than the sum of its proper divisors (6272463).

12872817 is a wasteful number, since it uses less digits than its factorization.

12872817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1869 (or 1863 counting only the distinct ones).

The product of its digits is 12544, while the sum is 36.

The square root of 12872817 is about 3587.8708170724. The cubic root of 12872817 is about 234.3641601387.

It can be divided in two parts, 12872 and 817, that added together give a square (13689 = 117²).

The spelling of 12872817 in words is "twelve million, eight hundred seventy-two thousand, eight hundred seventeen".