142321205641540 has 24 divisors (see below), whose sum is σ = 298875956769432. Its totient is φ = 56928210842880.

The previous prime is 142321205641469. The next prime is 142321205641583. The reversal of 142321205641540 is 45146502123241.

It can be written as a sum of positive squares in 4 ways, for example, as 44143586436096 + 98177619205444 = 6644064^2 + 9908462^2 .

It is a junction number, because it is equal to n+sod(n) for n = 142321205641493 and 142321205641502.

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 7 ways as a sum of consecutive naturals, for example, 12636609 + ... + 21079048.

It is an arithmetic number, because the mean of its divisors is an integer number (12453164865393).

Almost surely, 2^{142321205641540} is an apocalyptic number.

142321205641540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142321205641540 is an abundant number, since it is smaller than the sum of its proper divisors (156554751127892).

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

142321205641540 is a wasteful number, since it uses less digits than its factorization.

142321205641540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33926727 (or 33926725 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 40.

Adding to 142321205641540 its reverse (45146502123241), we get a palindrome (187467707764781).

The spelling of 142321205641540 in words is "one hundred forty-two trillion, three hundred twenty-one billion, two hundred five million, six hundred forty-one thousand, five hundred forty".