142221404 has 24 divisors (see below), whose sum is σ = 270548208. Its totient is φ = 65024640.

The previous prime is 142221379. The next prime is 142221493. The reversal of 142221404 is 404122241.

142221404 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7217 + ... + 18344.

It is an arithmetic number, because the mean of its divisors is an integer number (11272842).

Almost surely, 2^142221404 is an apocalyptic number.

It is an amenable number.

142221404 is a deficient number, since it is larger than the sum of its proper divisors (128326804).

142221404 is a wasteful number, since it uses less digits than its factorization.

142221404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25685 (or 25683 counting only the distinct ones).

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

The square root of 142221404 is about 11925.6615749400. The cubic root of 142221404 is about 521.9813511440.

Adding to 142221404 its reverse (404122241), we get a palindrome (546343645).

The spelling of 142221404 in words is "one hundred forty-two million, two hundred twenty-one thousand, four hundred four".