12729885 has 32 divisors (see below), whose sum is σ = 23853312. Its totient is φ = 5675520.

The previous prime is 12729877. The next prime is 12729901. The reversal of 12729885 is 58892721.

12729885 = 586² + 587² + ... + 620².

12729885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12729885 - 2³ = 12729877 is a prime.

It is a super-2 number, since 2×12729885² = 324099944226450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2827 + ... + 5783.

It is an arithmetic number, because the mean of its divisors is an integer number (745416).

Almost surely, 2^12729885 is an apocalyptic number.

12729885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12729885 is a deficient number, since it is larger than the sum of its proper divisors (11123427).

12729885 is a wasteful number, since it uses less digits than its factorization.

12729885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3013.

The product of its digits is 80640, while the sum is 42.

The square root of 12729885 is about 3567.8964390800. The cubic root of 12729885 is about 233.4935169927.

The spelling of 12729885 in words is "twelve million, seven hundred twenty-nine thousand, eight hundred eighty-five".