12820375 has 8 divisors (see below), whose sum is σ = 15999984. Its totient is φ = 10256200.

The previous prime is 12820373. The next prime is 12820427. The reversal of 12820375 is 57302821.

It is not a de Polignac number, because 12820375 - 2¹ = 12820373 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 (12820373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51157 + ... + 51406.

It is an arithmetic number, because the mean of its divisors is an integer number (1999998).

Almost surely, 2^12820375 is an apocalyptic number.

12820375 is a deficient number, since it is larger than the sum of its proper divisors (3179609).

12820375 is an equidigital number, since it uses as much as digits as its factorization.

12820375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102578 (or 102568 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 12820375 is about 3580.5551245582. Note that the first 3 decimals coincide. The cubic root of 12820375 is about 234.0454717194.

It can be divided in two parts, 128 and 20375, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 12820375 in words is "twelve million, eight hundred twenty thousand, three hundred seventy-five".