142420223 has 4 divisors (see below), whose sum is σ = 155367528. Its totient is φ = 129472920.

The previous prime is 142420193. The next prime is 142420253. The reversal of 142420223 is 322024241.

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

It is an interprime number because it is at equal distance from previous prime (142420193) and next prime (142420253).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142420223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142420195 and 142420204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142420253) 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, 6473636 + ... + 6473657.

It is an arithmetic number, because the mean of its divisors is an integer number (38841882).

Almost surely, 2^142420223 is an apocalyptic number.

142420223 is a deficient number, since it is larger than the sum of its proper divisors (12947305).

142420223 is a wasteful number, since it uses less digits than its factorization.

142420223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12947304.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 142420223 is about 11933.9944276843. The cubic root of 142420223 is about 522.2244732177.

Adding to 142420223 its reverse (322024241), we get a palindrome (464444464).

The spelling of 142420223 in words is "one hundred forty-two million, four hundred twenty thousand, two hundred twenty-three".