12817942 has 16 divisors (see below), whose sum is σ = 20534400. Its totient is φ = 5987520.

The previous prime is 12817933. The next prime is 12817943. The reversal of 12817942 is 24971821.

It is a junction number, because it is equal to n+sod(n) for n = 12817898 and 12817907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12817943) 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 7 ways as a sum of consecutive naturals, for example, 1767 + ... + 5362.

It is an arithmetic number, because the mean of its divisors is an integer number (1283400).

Almost surely, 2^12817942 is an apocalyptic number.

12817942 is a deficient number, since it is larger than the sum of its proper divisors (7716458).

12817942 is a wasteful number, since it uses less digits than its factorization.

12817942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7191.

The product of its digits is 8064, while the sum is 34.

The square root of 12817942 is about 3580.2153566510. The cubic root of 12817942 is about 234.0306653751.

The spelling of 12817942 in words is "twelve million, eight hundred seventeen thousand, nine hundred forty-two".