142221343 has 8 divisors (see below), whose sum is σ = 156434256. Its totient is φ = 129290920.

The previous prime is 142221323. The next prime is 142221349. The reversal of 142221343 is 343122241.

It is not a de Polignac number, because 142221343 - 2⁵ = 142221311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142221349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52096 + ... + 54757.

It is an arithmetic number, because the mean of its divisors is an integer number (19554282).

Almost surely, 2^142221343 is an apocalyptic number.

142221343 is a deficient number, since it is larger than the sum of its proper divisors (14212913).

142221343 is an equidigital number, since it uses as much as digits as its factorization.

142221343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106886 (or 106864 counting only the distinct ones).

The product of its digits is 1152, while the sum is 22.

The square root of 142221343 is about 11925.6590174296. The cubic root of 142221343 is about 521.9812765166.

Adding to 142221343 its reverse (343122241), we get a palindrome (485343584).

The spelling of 142221343 in words is "one hundred forty-two million, two hundred twenty-one thousand, three hundred forty-three".