140230042143421 has 4 divisors (see below), whose sum is σ = 140230088544700. Its totient is φ = 140229995742144.

The previous prime is 140230042143383. The next prime is 140230042143517. The reversal of 140230042143421 is 124341240032041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42082284771396 + 98147757372025 = 6487086^2 + 9906955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140230042143421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140230042143721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18326076 + ... + 24825493.

It is an arithmetic number, because the mean of its divisors is an integer number (35057522136175).

Almost surely, 2^{140230042143421} is an apocalyptic number.

It is an amenable number.

140230042143421 is a deficient number, since it is larger than the sum of its proper divisors (46401279).

140230042143421 is an equidigital number, since it uses as much as digits as its factorization.

140230042143421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46401278.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 140230042143421 its reverse (124341240032041), we get a palindrome (264571282175462).

The spelling of 140230042143421 in words is "one hundred forty trillion, two hundred thirty billion, forty-two million, one hundred forty-three thousand, four hundred twenty-one".