142221005 has 12 divisors (see below), whose sum is σ = 174939636. Its totient is φ = 110995200.

The previous prime is 142220999. The next prime is 142221019. The reversal of 142221005 is 500122241.

It can be written as a sum of positive squares in 6 ways, for example, as 35450116 + 106770889 = 5954^2 + 10333^2 .

It is not a de Polignac number, because 142221005 - 2⁴ = 142220989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56 + ... + 16865.

It is an arithmetic number, because the mean of its divisors is an integer number (14578303).

Almost surely, 2^142221005 is an apocalyptic number.

It is an amenable number.

142221005 is a deficient number, since it is larger than the sum of its proper divisors (32718631).

142221005 is an equidigital number, since it uses as much as digits as its factorization.

142221005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17008 (or 16967 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 142221005 is about 11925.6448462966. The cubic root of 142221005 is about 521.9808630066.

Adding to 142221005 its reverse (500122241), we get a palindrome (642343246).

The spelling of 142221005 in words is "one hundred forty-two million, two hundred twenty-one thousand, five".