12821525 has 12 divisors (see below), whose sum is σ = 16269792. Its totient is φ = 10017840.

The previous prime is 12821521. The next prime is 12821527. The reversal of 12821525 is 52512821.

12821525 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12821525 - 2² = 12821521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12821494 and 12821503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12821521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4889 + ... + 7038.

It is an arithmetic number, because the mean of its divisors is an integer number (1355816).

Almost surely, 2^12821525 is an apocalyptic number.

It is an amenable number.

12821525 is a deficient number, since it is larger than the sum of its proper divisors (3448267).

12821525 is a wasteful number, since it uses less digits than its factorization.

12821525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11980 (or 11975 counting only the distinct ones).

The product of its digits is 1600, while the sum is 26.

The square root of 12821525 is about 3580.7157105808. The cubic root of 12821525 is about 234.0524695450.

The spelling of 12821525 in words is "twelve million, eight hundred twenty-one thousand, five hundred twenty-five".