12435509 has 2 divisors, whose sum is σ = 12435510. Its totient is φ = 12435508.

The previous prime is 12435503. The next prime is 12435523. The reversal of 12435509 is 90553421.

12435509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7006609 + 5428900 = 2647^2 + 2330^2 .

It is a cyclic number.

It is not a de Polignac number, because 12435509 - 2¹² = 12431413 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12435503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6217754 + 6217755.

It is an arithmetic number, because the mean of its divisors is an integer number (6217755).

Almost surely, 2^12435509 is an apocalyptic number.

It is an amenable number.

12435509 is a deficient number, since it is larger than the sum of its proper divisors (1).

12435509 is an equidigital number, since it uses as much as digits as its factorization.

12435509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 12435509 is about 3526.4017071230. The cubic root of 12435509 is about 231.6796323736.

The spelling of 12435509 in words is "twelve million, four hundred thirty-five thousand, five hundred nine".