1242545103520 has 192 divisors, whose sum is σ = 3493554624000. Its totient is φ = 408599654400.

The previous prime is 1242545103517. The next prime is 1242545103523. The reversal of 1242545103520 is 253015452421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1242545103517) and next prime (1242545103523).

It is not an unprimeable number, because it can be changed into a prime (1242545103523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4777806 + ... + 5031154.

It is an arithmetic number, because the mean of its divisors is an integer number (18195597000).

Almost surely, 2^{1242545103520} is an apocalyptic number.

1242545103520 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 1242545103520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1746777312000).

1242545103520 is an abundant number, since it is smaller than the sum of its proper divisors (2251009520480).

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

1242545103520 is a wasteful number, since it uses less digits than its factorization.

1242545103520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253551 (or 253543 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 1242545103520 in words is "one trillion, two hundred forty-two billion, five hundred forty-five million, one hundred three thousand, five hundred twenty".