12540134742 has 8 divisors (see below), whose sum is σ = 25080269496. Its totient is φ = 4180044912.

The previous prime is 12540134741. The next prime is 12540134749. The reversal of 12540134742 is 24743104521.

It is a sphenic number, since it is the product of 3 distinct primes.

12540134742 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12540134741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1045011223 + ... + 1045011234.

It is an arithmetic number, because the mean of its divisors is an integer number (3135033687).

Almost surely, 2^12540134742 is an apocalyptic number.

12540134742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12540134742 is a wasteful number, since it uses less digits than its factorization.

12540134742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2090022462.

The product of its (nonzero) digits is 26880, while the sum is 33.

The spelling of 12540134742 in words is "twelve billion, five hundred forty million, one hundred thirty-four thousand, seven hundred forty-two".