12542155354120 has 128 divisors (see below), whose sum is σ = 34200692467200. Its totient is φ = 4041017634816.

The previous prime is 12542155354033. The next prime is 12542155354133. The reversal of 12542155354120 is 2145355124521.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1090741 + ... + 5125819.

It is an arithmetic number, because the mean of its divisors is an integer number (267192909900).

Almost surely, 2^{12542155354120} is an apocalyptic number.

12542155354120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12542155354120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17100346233600).

12542155354120 is an abundant number, since it is smaller than the sum of its proper divisors (21658537113080).

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

12542155354120 is a wasteful number, since it uses less digits than its factorization.

12542155354120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4035767 (or 4035763 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 40.

The spelling of 12542155354120 in words is "twelve trillion, five hundred forty-two billion, one hundred fifty-five million, three hundred fifty-four thousand, one hundred twenty".