142242443521 has 4 divisors (see below), whose sum is σ = 142244125632. Its totient is φ = 142240761412.

The previous prime is 142242443513. The next prime is 142242443533. The reversal of 142242443521 is 125344242241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 142242443521 - 2³ = 142242443513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142242443591) 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, 707101 + ... + 885706.

It is an arithmetic number, because the mean of its divisors is an integer number (35561031408).

Almost surely, 2^142242443521 is an apocalyptic number.

It is an amenable number.

142242443521 is a deficient number, since it is larger than the sum of its proper divisors (1682111).

142242443521 is an equidigital number, since it uses as much as digits as its factorization.

142242443521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1682110.

The product of its digits is 61440, while the sum is 34.

Adding to 142242443521 its reverse (125344242241), we get a palindrome (267586685762).

The spelling of 142242443521 in words is "one hundred forty-two billion, two hundred forty-two million, four hundred forty-three thousand, five hundred twenty-one".