12405143472 has 160 divisors (see below), whose sum is σ = 36415526400. Its totient is φ = 3617703936.

The previous prime is 12405143467. The next prime is 12405143473. The reversal of 12405143472 is 27434150421.

It is not an unprimeable number, because it can be changed into a prime (12405143473) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 598108 + ... + 618500.

It is an arithmetic number, because the mean of its divisors is an integer number (227597040).

Almost surely, 2^12405143472 is an apocalyptic number.

12405143472 is a gapful number since it is divisible by the number (12) 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 12405143472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18207763200).

12405143472 is an abundant number, since it is smaller than the sum of its proper divisors (24010382928).

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

12405143472 is a wasteful number, since it uses less digits than its factorization.

12405143472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20475 (or 20469 counting only the distinct ones).

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

Adding to 12405143472 its reverse (27434150421), we get a palindrome (39839293893).

The spelling of 12405143472 in words is "twelve billion, four hundred five million, one hundred forty-three thousand, four hundred seventy-two".