142222706 has 4 divisors (see below), whose sum is σ = 213334062. Its totient is φ = 71111352.

The previous prime is 142222693. The next prime is 142222723. The reversal of 142222706 is 607222241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 607222241 = 23 ⋅26400967.

It can be written as a sum of positive squares in only one way, i.e., 132457081 + 9765625 = 11509^2 + 3125^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35555675 + ... + 35555678.

Almost surely, 2^142222706 is an apocalyptic number.

142222706 is a deficient number, since it is larger than the sum of its proper divisors (71111356).

142222706 is an equidigital number, since it uses as much as digits as its factorization.

142222706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71111355.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 142222706 is about 11925.7161629816. The cubic root of 142222706 is about 521.9829440070.

Adding to 142222706 its reverse (607222241), we get a palindrome (749444947).

The spelling of 142222706 in words is "one hundred forty-two million, two hundred twenty-two thousand, seven hundred six".