12812140 has 24 divisors (see below), whose sum is σ = 29351952. Its totient is φ = 4658880.

The previous prime is 12812123. The next prime is 12812143. The reversal of 12812140 is 4121821.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12812143) 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, 28899 + ... + 29338.

It is an arithmetic number, because the mean of its divisors is an integer number (1222998).

Almost surely, 2^12812140 is an apocalyptic number.

12812140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12812140 is an abundant number, since it is smaller than the sum of its proper divisors (16539812).

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

12812140 is a wasteful number, since it uses less digits than its factorization.

12812140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58257 (or 58255 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 12812140 is about 3579.4049784846. The cubic root of 12812140 is about 233.9953489713.

Adding to 12812140 its reverse (4121821), we get a palindrome (16933961).

The spelling of 12812140 in words is "twelve million, eight hundred twelve thousand, one hundred forty".