142921442 has 4 divisors (see below), whose sum is σ = 214382166. Its totient is φ = 71460720.

The previous prime is 142921399. The next prime is 142921447. The reversal of 142921442 is 244129241.

142921442 is digitally balanced in base 3, 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, and also an emirpimes, since its reverse is a distinct semiprime: 244129241 = 277 ⋅881333.

It can be written as a sum of positive squares in only one way, i.e., 102839881 + 40081561 = 10141^2 + 6331^2 .

It is not an unprimeable number, because it can be changed into a prime (142921447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35730359 + ... + 35730362.

Almost surely, 2^142921442 is an apocalyptic number.

142921442 is a deficient number, since it is larger than the sum of its proper divisors (71460724).

142921442 is an equidigital number, since it uses as much as digits as its factorization.

142921442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71460723.

The product of its digits is 4608, while the sum is 29.

The square root of 142921442 is about 11954.9756168718. The cubic root of 142921442 is about 522.8363768842.

The spelling of 142921442 in words is "one hundred forty-two million, nine hundred twenty-one thousand, four hundred forty-two".