12895521 has 4 divisors (see below), whose sum is σ = 17194032. Its totient is φ = 8597012.

The previous prime is 12895513. The next prime is 12895529. The reversal of 12895521 is 12559821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (12895513) and next prime (12895529).

It is a cyclic number.

It is not a de Polignac number, because 12895521 - 2³ = 12895513 is a prime.

It is a super-3 number, since 3×12895521³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (12895529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2149251 + ... + 2149256.

It is an arithmetic number, because the mean of its divisors is an integer number (4298508).

Almost surely, 2^12895521 is an apocalyptic number.

It is an amenable number.

12895521 is a deficient number, since it is larger than the sum of its proper divisors (4298511).

12895521 is an equidigital number, since it uses as much as digits as its factorization.

12895521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4298510.

The product of its digits is 7200, while the sum is 33.

The square root of 12895521 is about 3591.0334167200. The cubic root of 12895521 is about 234.5018631943.

The spelling of 12895521 in words is "twelve million, eight hundred ninety-five thousand, five hundred twenty-one".