12560729 has 4 divisors (see below), whose sum is σ = 13221840. Its totient is φ = 11899620.

The previous prime is 12560711. The next prime is 12560731. The reversal of 12560729 is 92706521.

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 a de Polignac number, because none of the positive numbers 2^k-12560729 is a prime.

It is a super-2 number, since 2×12560729² = 315543826022882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12560695 and 12560704.

It is not an unprimeable number, because it can be changed into a prime (12560749) 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, 330527 + ... + 330564.

It is an arithmetic number, because the mean of its divisors is an integer number (3305460).

Almost surely, 2^12560729 is an apocalyptic number.

12560729 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12560729 is a deficient number, since it is larger than the sum of its proper divisors (661111).

12560729 is an equidigital number, since it uses as much as digits as its factorization.

12560729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661110.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 12560729 is about 3544.1118774666. Note that the first 3 decimals coincide. The cubic root of 12560729 is about 232.4546734009.

The spelling of 12560729 in words is "twelve million, five hundred sixty thousand, seven hundred twenty-nine".