142240539823 has 4 divisors (see below), whose sum is σ = 142282889280. Its totient is φ = 142198190368.

The previous prime is 142240539821. The next prime is 142240539853. The reversal of 142240539823 is 328935042241.

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

It is a cyclic number.

It is not a de Polignac number, because 142240539823 - 2¹ = 142240539821 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142240539823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142240539821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21169690 + ... + 21176407.

It is an arithmetic number, because the mean of its divisors is an integer number (35570722320).

Almost surely, 2^142240539823 is an apocalyptic number.

142240539823 is a deficient number, since it is larger than the sum of its proper divisors (42349457).

142240539823 is an equidigital number, since it uses as much as digits as its factorization.

142240539823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42349456.

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 142240539823 in words is "one hundred forty-two billion, two hundred forty million, five hundred thirty-nine thousand, eight hundred twenty-three".