12543241420 has 48 divisors (see below), whose sum is σ = 26554026240. Its totient is φ = 4976849664.

The previous prime is 12543241387. The next prime is 12543241423. The reversal of 12543241420 is 2414234521.

It is not an unprimeable number, because it can be changed into a prime (12543241423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1263717 + ... + 1273603.

It is an arithmetic number, because the mean of its divisors is an integer number (553208880).

Almost surely, 2^12543241420 is an apocalyptic number.

12543241420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12543241420 is an abundant number, since it is smaller than the sum of its proper divisors (14010784820).

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

12543241420 is a wasteful number, since it uses less digits than its factorization.

12543241420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10402 (or 10400 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 12543241420 its reverse (2414234521), we get a palindrome (14957475941).

The spelling of 12543241420 in words is "twelve billion, five hundred forty-three million, two hundred forty-one thousand, four hundred twenty".