1243140120240 has 80 divisors (see below), whose sum is σ = 3854091441408. Its totient is φ = 331473316608.

The previous prime is 1243140120181. The next prime is 1243140120263. The reversal of 1243140120240 is 420210413421.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1243140120240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2416839 + ... + 2885721.

Almost surely, 2^{1243140120240} is an apocalyptic number.

1243140120240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243140120240 is an abundant number, since it is smaller than the sum of its proper divisors (2610951321168).

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

1243140120240 is a wasteful number, since it uses less digits than its factorization.

1243140120240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479946 (or 479940 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 1243140120240 its reverse (420210413421), we get a palindrome (1663350533661).

The spelling of 1243140120240 in words is "one trillion, two hundred forty-three billion, one hundred forty million, one hundred twenty thousand, two hundred forty".