12653569 has 4 divisors (see below), whose sum is σ = 12670020. Its totient is φ = 12637120.

The previous prime is 12653551. The next prime is 12653579. The reversal of 12653569 is 96535621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12110400 + 543169 = 3480^2 + 737^2 .

It is a cyclic number.

It is not a de Polignac number, because 12653569 - 2⁷ = 12653441 is a prime.

It is a super-4 number, since 4×12653569⁴ (a number of 30 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12653539) 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, 7012 + ... + 8629.

It is an arithmetic number, because the mean of its divisors is an integer number (3167505).

Almost surely, 2^12653569 is an apocalyptic number.

It is an amenable number.

12653569 is a deficient number, since it is larger than the sum of its proper divisors (16451).

12653569 is an equidigital number, since it uses as much as digits as its factorization.

12653569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16450.

The product of its digits is 48600, while the sum is 37.

The square root of 12653569 is about 3557.1855447812. The cubic root of 12653569 is about 233.0259814949.

The spelling of 12653569 in words is "twelve million, six hundred fifty-three thousand, five hundred sixty-nine".