1142720021040 has 160 divisors (see below), whose sum is σ = 3831588304320. Its totient is φ = 280056434688.

The previous prime is 1142720020969. The next prime is 1142720021081. The reversal of 1142720021040 is 401200272411.

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 1142720021040.

It is an unprimeable number.

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, 85207 + ... + 1514166.

It is an arithmetic number, because the mean of its divisors is an integer number (23947426902).

Almost surely, 2^{1142720021040} is an apocalyptic number.

1142720021040 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 1142720021040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1915794152160).

1142720021040 is an abundant number, since it is smaller than the sum of its proper divisors (2688868283280).

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

1142720021040 is a wasteful number, since it uses less digits than its factorization.

1142720021040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599631 (or 1599625 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

Adding to 1142720021040 its reverse (401200272411), we get a palindrome (1543920293451).

The spelling of 1142720021040 in words is "one trillion, one hundred forty-two billion, seven hundred twenty million, twenty-one thousand, forty".