12542140671 has 4 divisors (see below), whose sum is σ = 16722854232. Its totient is φ = 8361427112.

The previous prime is 12542140657. The next prime is 12542140697. The reversal of 12542140671 is 17604124521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12542140671 - 2⁶ = 12542140607 is a prime.

It is a super-2 number, since 2×12542140671² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12542140571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2090356776 + ... + 2090356781.

It is an arithmetic number, because the mean of its divisors is an integer number (4180713558).

Almost surely, 2^12542140671 is an apocalyptic number.

12542140671 is a deficient number, since it is larger than the sum of its proper divisors (4180713561).

12542140671 is an equidigital number, since it uses as much as digits as its factorization.

12542140671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4180713560.

The product of its (nonzero) digits is 13440, while the sum is 33.

The spelling of 12542140671 in words is "twelve billion, five hundred forty-two million, one hundred forty thousand, six hundred seventy-one".