12135529 has 4 divisors (see below), whose sum is σ = 13869184. Its totient is φ = 10401876.

The previous prime is 12135521. The next prime is 12135551. The reversal of 12135529 is 92553121.

12135529 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, and also an emirpimes, since its reverse is a distinct semiprime: 92553121 = 227 ⋅407723.

It is a cyclic number.

It is not a de Polignac number, because 12135529 - 2³ = 12135521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12135497 and 12135506.

It is not an unprimeable number, because it can be changed into a prime (12135521) 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, 866817 + ... + 866830.

It is an arithmetic number, because the mean of its divisors is an integer number (3467296).

Almost surely, 2^12135529 is an apocalyptic number.

It is an amenable number.

12135529 is a deficient number, since it is larger than the sum of its proper divisors (1733655).

12135529 is an equidigital number, since it uses as much as digits as its factorization.

12135529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733654.

The product of its digits is 2700, while the sum is 28.

The square root of 12135529 is about 3483.6086175114. The cubic root of 12135529 is about 229.8015237983.

The spelling of 12135529 in words is "twelve million, one hundred thirty-five thousand, five hundred twenty-nine".