12943540 has 24 divisors (see below), whose sum is σ = 27310752. Its totient is φ = 5152800.

The previous prime is 12943531. The next prime is 12943543. The reversal of 12943540 is 4534921.

It is a junction number, because it is equal to n+sod(n) for n = 12943499 and 12943508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12943543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3115 + ... + 5965.

It is an arithmetic number, because the mean of its divisors is an integer number (1137948).

Almost surely, 2^12943540 is an apocalyptic number.

12943540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12943540 is an abundant number, since it is smaller than the sum of its proper divisors (14367212).

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

12943540 is a wasteful number, since it uses less digits than its factorization.

12943540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3087 (or 3085 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 12943540 is about 3597.7131625520. The cubic root of 12943540 is about 234.7925738698.

The spelling of 12943540 in words is "twelve million, nine hundred forty-three thousand, five hundred forty".