12526009 has 2 divisors, whose sum is σ = 12526010. Its totient is φ = 12526008.

The previous prime is 12526001. The next prime is 12526021. The reversal of 12526009 is 90062521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11370384 + 1155625 = 3372^2 + 1075^2 .

It is a cyclic number.

It is not a de Polignac number, because 12526009 - 2³ = 12526001 is a prime.

It is not a weakly prime, because it can be changed into another prime (12526001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6263004 + 6263005.

It is an arithmetic number, because the mean of its divisors is an integer number (6263005).

Almost surely, 2^12526009 is an apocalyptic number.

It is an amenable number.

12526009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12526009 is an equidigital number, since it uses as much as digits as its factorization.

12526009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 12526009 is about 3539.2102226344. The cubic root of 12526009 is about 232.2402942811.

The spelling of 12526009 in words is "twelve million, five hundred twenty-six thousand, nine".