12820851 has 6 divisors (see below), whose sum is σ = 18519020. Its totient is φ = 8547228.

The previous prime is 12820849. The next prime is 12820853. The reversal of 12820851 is 15802821.

12820851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12820849) and next prime (12820853).

It is not a de Polignac number, because 12820851 - 2¹ = 12820849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12820853) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 712261 + ... + 712278.

Almost surely, 2^12820851 is an apocalyptic number.

12820851 is a deficient number, since it is larger than the sum of its proper divisors (5698169).

12820851 is a wasteful number, since it uses less digits than its factorization.

12820851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424545 (or 1424542 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 12820851 is about 3580.6215940811. The cubic root of 12820851 is about 234.0483682614.

The spelling of 12820851 in words is "twelve million, eight hundred twenty thousand, eight hundred fifty-one".