142444223 has 4 divisors (see below), whose sum is σ = 142479888. Its totient is φ = 142408560.

The previous prime is 142444213. The next prime is 142444249. The reversal of 142444223 is 322444241.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142444223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142444192 and 142444201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142444213) 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, 10958 + ... + 20123.

It is an arithmetic number, because the mean of its divisors is an integer number (35619972).

Almost surely, 2^142444223 is an apocalyptic number.

142444223 is a deficient number, since it is larger than the sum of its proper divisors (35665).

142444223 is an equidigital number, since it uses as much as digits as its factorization.

142444223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35664.

The product of its digits is 6144, while the sum is 26.

The square root of 142444223 is about 11934.9999162128. Note that the first 4 decimals coincide. The cubic root of 142444223 is about 522.2538058577.

Adding to 142444223 its reverse (322444241), we get a palindrome (464888464).

The spelling of 142444223 in words is "one hundred forty-two million, four hundred forty-four thousand, two hundred twenty-three".