12821625 has 64 divisors (see below), whose sum is σ = 24710400. Its totient is φ = 6552000.

The previous prime is 12821623. The next prime is 12821629. The reversal of 12821625 is 52612821.

It is a happy number.

12821625 is a `hidden beast` number, since 12 + 8 + 21 + 625 = 666.

12821625 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12821625 - 2¹ = 12821623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12821623) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 97810 + ... + 97940.

It is an arithmetic number, because the mean of its divisors is an integer number (386100).

Almost surely, 2^12821625 is an apocalyptic number.

12821625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12821625 is a deficient number, since it is larger than the sum of its proper divisors (11888775).

12821625 is a wasteful number, since it uses less digits than its factorization.

12821625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 168 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 12821625 is about 3580.7296742424. The cubic root of 12821625 is about 234.0530780318.

The spelling of 12821625 in words is "twelve million, eight hundred twenty-one thousand, six hundred twenty-five".