12871240 has 32 divisors (see below), whose sum is σ = 29165760. Its totient is φ = 5112000.

The previous prime is 12871207. The next prime is 12871241. The reversal of 12871240 is 4217821.

It is a happy number.

It is a Smith number, since the sum of its digits (25) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (12871241) 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, 4975 + ... + 7105.

It is an arithmetic number, because the mean of its divisors is an integer number (911430).

Almost surely, 2^12871240 is an apocalyptic number.

12871240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12871240 is an abundant number, since it is smaller than the sum of its proper divisors (16294520).

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

12871240 is a wasteful number, since it uses less digits than its factorization.

12871240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2293 (or 2289 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 12871240 is about 3587.6510421166. The cubic root of 12871240 is about 234.3545893930.

The spelling of 12871240 in words is "twelve million, eight hundred seventy-one thousand, two hundred forty".