12542112405 has 24 divisors (see below), whose sum is σ = 22684866048. Its totient is φ = 6398294496.

The previous prime is 12542112403. The next prime is 12542112413. The reversal of 12542112405 is 50421124521.

It is a happy number.

12542112405 is a `hidden beast` number, since 1 + 2 + 542 + 112 + 4 + 0 + 5 = 666.

It is not a de Polignac number, because 12542112405 - 2¹ = 12542112403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12542112403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6057957 + ... + 6060026.

It is an arithmetic number, because the mean of its divisors is an integer number (945202752).

Almost surely, 2^12542112405 is an apocalyptic number.

12542112405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12542112405 is a deficient number, since it is larger than the sum of its proper divisors (10142753643).

12542112405 is a wasteful number, since it uses less digits than its factorization.

12542112405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12118017 (or 12118014 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 12542112405 its reverse (50421124521), we get a palindrome (62963236926).

The spelling of 12542112405 in words is "twelve billion, five hundred forty-two million, one hundred twelve thousand, four hundred five".