12526321 has 4 divisors (see below), whose sum is σ = 12617892. Its totient is φ = 12434752.

The previous prime is 12526309. The next prime is 12526337. The reversal of 12526321 is 12362521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4145296 + 8381025 = 2036^2 + 2895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12526321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12526292 and 12526301.

It is not an unprimeable number, because it can be changed into a prime (12526021) 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, 45580 + ... + 45853.

It is an arithmetic number, because the mean of its divisors is an integer number (3154473).

Almost surely, 2^12526321 is an apocalyptic number.

It is an amenable number.

12526321 is a deficient number, since it is larger than the sum of its proper divisors (91571).

12526321 is an equidigital number, since it uses as much as digits as its factorization.

12526321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91570.

The product of its digits is 720, while the sum is 22.

The square root of 12526321 is about 3539.2542999903. The cubic root of 12526321 is about 232.2422224922.

Adding to 12526321 its reverse (12362521), we get a palindrome (24888842).

The spelling of 12526321 in words is "twelve million, five hundred twenty-six thousand, three hundred twenty-one".