12730529 has 4 divisors (see below), whose sum is σ = 14549184. Its totient is φ = 10911876.

The previous prime is 12730519. The next prime is 12730567. The reversal of 12730529 is 92503721.

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 not a de Polignac number, because 12730529 - 2¹² = 12726433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12730519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 909317 + ... + 909330.

It is an arithmetic number, because the mean of its divisors is an integer number (3637296).

Almost surely, 2^12730529 is an apocalyptic number.

It is an amenable number.

12730529 is a deficient number, since it is larger than the sum of its proper divisors (1818655).

12730529 is an equidigital number, since it uses as much as digits as its factorization.

12730529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818654.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 12730529 is about 3567.9866871949. The cubic root of 12730529 is about 233.4974543754.

The spelling of 12730529 in words is "twelve million, seven hundred thirty thousand, five hundred twenty-nine".