12001569 has 4 divisors (see below), whose sum is σ = 16002096. Its totient is φ = 8001044.

The previous prime is 12001553. The next prime is 12001571. The reversal of 12001569 is 96510021.

12001569 is digitally balanced in base 3, 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.

It is a cyclic number.

It is not a de Polignac number, because 12001569 - 2⁴ = 12001553 is a prime.

It is a super-2 number, since 2×12001569² = 288075316923522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12001169) 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, 2000259 + ... + 2000264.

It is an arithmetic number, because the mean of its divisors is an integer number (4000524).

Almost surely, 2^12001569 is an apocalyptic number.

It is an amenable number.

12001569 is a deficient number, since it is larger than the sum of its proper divisors (4000527).

12001569 is an equidigital number, since it uses as much as digits as its factorization.

12001569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4000526.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 12001569 is about 3464.3280733787. The cubic root of 12001569 is about 228.9528261683.

The spelling of 12001569 in words is "twelve million, one thousand, five hundred sixty-nine".