12729605 has 16 divisors (see below), whose sum is σ = 17518464. Its totient is φ = 8698560.

The previous prime is 12729589. The next prime is 12729611. The reversal of 12729605 is 50692721.

It is not a de Polignac number, because 12729605 - 2⁴ = 12729589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15095 + ... + 15915.

It is an arithmetic number, because the mean of its divisors is an integer number (1094904).

Almost surely, 2^12729605 is an apocalyptic number.

It is an amenable number.

12729605 is a deficient number, since it is larger than the sum of its proper divisors (4788859).

12729605 is an equidigital number, since it uses as much as digits as its factorization.

12729605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276.

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

The square root of 12729605 is about 3567.8572000572. The cubic root of 12729605 is about 233.4918050457.

The spelling of 12729605 in words is "twelve million, seven hundred twenty-nine thousand, six hundred five".