12029521 has 4 divisors (see below), whose sum is σ = 13748032. Its totient is φ = 10311012.

The previous prime is 12029513. The next prime is 12029531. The reversal of 12029521 is 12592021.

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 12029521 - 2³ = 12029513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12029492 and 12029501.

It is not an unprimeable number, because it can be changed into a prime (12029531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 859245 + ... + 859258.

It is an arithmetic number, because the mean of its divisors is an integer number (3437008).

Almost surely, 2^12029521 is an apocalyptic number.

It is an amenable number.

12029521 is a deficient number, since it is larger than the sum of its proper divisors (1718511).

12029521 is an equidigital number, since it uses as much as digits as its factorization.

12029521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718510.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 12029521 is about 3468.3599870832. The cubic root of 12029521 is about 229.1304342644.

Subtracting 12029521 from its reverse (12592021), we obtain a square (562500 = 750²).

The spelling of 12029521 in words is "twelve million, twenty-nine thousand, five hundred twenty-one".