142221422 has 48 divisors (see below), whose sum is σ = 276650640. Its totient is φ = 54335232.

The previous prime is 142221379. The next prime is 142221493. The reversal of 142221422 is 224122241.

It is a junction number, because it is equal to n+sod(n) for n = 142221394 and 142221403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29408 + ... + 33900.

It is an arithmetic number, because the mean of its divisors is an integer number (5763555).

Almost surely, 2^142221422 is an apocalyptic number.

142221422 is a deficient number, since it is larger than the sum of its proper divisors (134429218).

142221422 is a wasteful number, since it uses less digits than its factorization.

142221422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4545 (or 4538 counting only the distinct ones).

The product of its digits is 512, while the sum is 20.

The square root of 142221422 is about 11925.6623296151. The cubic root of 142221422 is about 521.9813731652.

Adding to 142221422 its reverse (224122241), we get a palindrome (366343663).

The spelling of 142221422 in words is "one hundred forty-two million, two hundred twenty-one thousand, four hundred twenty-two".