12803842 has 4 divisors (see below), whose sum is σ = 19205766. Its totient is φ = 6401920.

The previous prime is 12803803. The next prime is 12803851. The reversal of 12803842 is 24830821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24830821 = 139 ⋅178639.

It can be written as a sum of positive squares in only one way, i.e., 9235521 + 3568321 = 3039^2 + 1889^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12803842.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3200959 + ... + 3200962.

Almost surely, 2^12803842 is an apocalyptic number.

12803842 is a deficient number, since it is larger than the sum of its proper divisors (6401924).

12803842 is an equidigital number, since it uses as much as digits as its factorization.

12803842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6401923.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 12803842 is about 3578.2456595376. The cubic root of 12803842 is about 233.9448210411.

The spelling of 12803842 in words is "twelve million, eight hundred three thousand, eight hundred forty-two".