12712540 has 24 divisors (see below), whose sum is σ = 26767440. Its totient is φ = 5071488.

The previous prime is 12712519. The next prime is 12712543. The reversal of 12712540 is 4521721.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12712543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10696 + ... + 11824.

It is an arithmetic number, because the mean of its divisors is an integer number (1115310).

Almost surely, 2^12712540 is an apocalyptic number.

12712540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12712540 is an abundant number, since it is smaller than the sum of its proper divisors (14054900).

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

12712540 is a wasteful number, since it uses less digits than its factorization.

12712540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701 (or 1699 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 12712540 is about 3565.4649065725. The cubic root of 12712540 is about 233.3874205681.

The spelling of 12712540 in words is "twelve million, seven hundred twelve thousand, five hundred forty".