12840325 has 24 divisors (see below), whose sum is σ = 16838208. Its totient is φ = 9694080.

The previous prime is 12840323. The next prime is 12840337. The reversal of 12840325 is 52304821.

It is not a de Polignac number, because 12840325 - 2¹ = 12840323 is a prime.

It is a super-2 number, since 2×12840325² = 329747892211250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 12840325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12840323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78694 + ... + 78856.

It is an arithmetic number, because the mean of its divisors is an integer number (701592).

Almost surely, 2^12840325 is an apocalyptic number.

It is an amenable number.

12840325 is a deficient number, since it is larger than the sum of its proper divisors (3997883).

12840325 is a wasteful number, since it uses less digits than its factorization.

12840325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 12840325 is about 3583.3399224746. The cubic root of 12840325 is about 234.1668094938.

The spelling of 12840325 in words is "twelve million, eight hundred forty thousand, three hundred twenty-five".