1242271284540 has 576 divisors, whose sum is σ = 4311708226560. Its totient is φ = 264526479360.

The previous prime is 1242271284511. The next prime is 1242271284547. The reversal of 1242271284540 is 454821722421.

It is a junction number, because it is equal to n+sod(n) for n = 1242271284492 and 1242271284501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242271284547) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 6436638684 + ... + 6436638876.

It is an arithmetic number, because the mean of its divisors is an integer number (7485604560).

Almost surely, 2^{1242271284540} is an apocalyptic number.

1242271284540 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 1242271284540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2155854113280).

1242271284540 is an abundant number, since it is smaller than the sum of its proper divisors (3069436942020).

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

1242271284540 is a wasteful number, since it uses less digits than its factorization.

1242271284540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 42.

The spelling of 1242271284540 in words is "one trillion, two hundred forty-two billion, two hundred seventy-one million, two hundred eighty-four thousand, five hundred forty".