12729140 has 24 divisors (see below), whose sum is σ = 26853120. Its totient is φ = 5068448.

The previous prime is 12729137. The next prime is 12729179. The reversal of 12729140 is 4192721.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3449 + ... + 6111.

It is an arithmetic number, because the mean of its divisors is an integer number (1118880).

Almost surely, 2^12729140 is an apocalyptic number.

12729140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12729140 is an abundant number, since it is smaller than the sum of its proper divisors (14123980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12729140 is a wasteful number, since it uses less digits than its factorization.

12729140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2911 (or 2909 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 12729140 is about 3567.7920342980. The cubic root of 12729140 is about 233.4889619354.

The spelling of 12729140 in words is "twelve million, seven hundred twenty-nine thousand, one hundred forty".