142321105440 has 144 divisors (see below), whose sum is σ = 485832949056. Its totient is φ = 37939622400.

The previous prime is 142321105439. The next prime is 142321105441. The reversal of 142321105440 is 44501123241.

142321105440 is a `hidden beast` number, since 1 + 4 + 2 + 3 + 2 + 110 + 544 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (142321105439) and next prime (142321105441).

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (142321105441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4781805 + ... + 4811475.

It is an arithmetic number, because the mean of its divisors is an integer number (3373839924).

Almost surely, 2^142321105440 is an apocalyptic number.

142321105440 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 142321105440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242916474528).

142321105440 is an abundant number, since it is smaller than the sum of its proper divisors (343511843616).

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

142321105440 is a wasteful number, since it uses less digits than its factorization.

142321105440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33023 (or 33012 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 142321105440 its reverse (44501123241), we get a palindrome (186822228681).

The spelling of 142321105440 in words is "one hundred forty-two billion, three hundred twenty-one million, one hundred five thousand, four hundred forty".