1243043124440 has 192 divisors, whose sum is σ = 3154244276160. Its totient is φ = 440269240320.

The previous prime is 1243043124439. The next prime is 1243043124461. The reversal of 1243043124440 is 444213403421.

It is a junction number, because it is equal to n+sod(n) for n = 1243043124397 and 1243043124406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17723522 + ... + 17793518.

It is an arithmetic number, because the mean of its divisors is an integer number (16428355605).

Almost surely, 2^{1243043124440} is an apocalyptic number.

1243043124440 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 1243043124440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1577122138080).

1243043124440 is an abundant number, since it is smaller than the sum of its proper divisors (1911201151720).

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

1243043124440 is a wasteful number, since it uses less digits than its factorization.

1243043124440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70142 (or 70125 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 1243043124440 its reverse (444213403421), we get a palindrome (1687256527861).

The spelling of 1243043124440 in words is "one trillion, two hundred forty-three billion, forty-three million, one hundred twenty-four thousand, four hundred forty".