1242513040000 has 80 divisors (see below), whose sum is σ = 3093158755170. Its totient is φ = 497005184000.

The previous prime is 1242513039979. The next prime is 1242513040003. The reversal of 1242513040000 is 403152421.

It can be written as a sum of positive squares in 5 ways, for example, as 154864286784 + 1087648753216 = 393528^2 + 1042904^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1242513040003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7685707 + ... + 7845706.

Almost surely, 2^{1242513040000} is an apocalyptic number.

1242513040000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242513040000 is an abundant number, since it is smaller than the sum of its proper divisors (1850645715170).

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

1242513040000 is an frugal number, since it uses more digits than its factorization.

1242513040000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15531447 (or 15531420 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 1242513040000 its reverse (403152421), we get a palindrome (1242916192421).

The spelling of 1242513040000 in words is "one trillion, two hundred forty-two billion, five hundred thirteen million, forty thousand".