12245521 has 4 divisors (see below), whose sum is σ = 12506112. Its totient is φ = 11984932.

The previous prime is 12245503. The next prime is 12245533. The reversal of 12245521 is 12554221.

12245521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12245521 is a prime.

It is a super-2 number, since 2×12245521² = 299905569122882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12245492 and 12245501.

It is not an unprimeable number, because it can be changed into a prime (12245501) 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, 130225 + ... + 130318.

It is an arithmetic number, because the mean of its divisors is an integer number (3126528).

Almost surely, 2^12245521 is an apocalyptic number.

It is an amenable number.

12245521 is a deficient number, since it is larger than the sum of its proper divisors (260591).

12245521 is an equidigital number, since it uses as much as digits as its factorization.

12245521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260590.

The product of its digits is 800, while the sum is 22.

The square root of 12245521 is about 3499.3600843583. The cubic root of 12245521 is about 230.4937157438.

Adding to 12245521 its reverse (12554221), we get a palindrome (24799742).

The spelling of 12245521 in words is "twelve million, two hundred forty-five thousand, five hundred twenty-one".