142042321 has 4 divisors (see below), whose sum is σ = 142132644. Its totient is φ = 141952000.

The previous prime is 142042301. The next prime is 142042331. The reversal of 142042321 is 123240241.

142042321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 109495296 + 32547025 = 10464^2 + 5705^2 .

It is a cyclic number.

It is not a de Polignac number, because 142042321 - 2⁵ = 142042289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142042301) 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, 42760 + ... + 45961.

It is an arithmetic number, because the mean of its divisors is an integer number (35533161).

Almost surely, 2^142042321 is an apocalyptic number.

It is an amenable number.

142042321 is a deficient number, since it is larger than the sum of its proper divisors (90323).

142042321 is an equidigital number, since it uses as much as digits as its factorization.

142042321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90322.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 142042321 is about 11918.1509052369. The cubic root of 142042321 is about 521.7621688304.

Adding to 142042321 its reverse (123240241), we get a palindrome (265282562).

The spelling of 142042321 in words is "one hundred forty-two million, forty-two thousand, three hundred twenty-one".