142205423 has 4 divisors (see below), whose sum is σ = 144327960. Its totient is φ = 140082888.

The previous prime is 142205417. The next prime is 142205431. The reversal of 142205423 is 324502241.

It is a happy number.

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 142205423 - 2⁴ = 142205407 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 (142205123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061168 + ... + 1061301.

It is an arithmetic number, because the mean of its divisors is an integer number (36081990).

Almost surely, 2^142205423 is an apocalyptic number.

142205423 is a deficient number, since it is larger than the sum of its proper divisors (2122537).

142205423 is an equidigital number, since it uses as much as digits as its factorization.

142205423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122536.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 142205423 is about 11924.9915303953. The cubic root of 142205423 is about 521.9617992430.

Adding to 142205423 its reverse (324502241), we get a palindrome (466707664).

The spelling of 142205423 in words is "one hundred forty-two million, two hundred five thousand, four hundred twenty-three".