142226444 has 18 divisors (see below), whose sum is σ = 251555220. Its totient is φ = 70361472.

The previous prime is 142226423. The next prime is 142226453. The reversal of 142226444 is 444622241.

It is a super-2 number, since 2×142226444² = 40456722745770272, which contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 35747 + ... + 39525.

It is an arithmetic number, because the mean of its divisors is an integer number (13975290).

Almost surely, 2^142226444 is an apocalyptic number.

It is an amenable number.

142226444 is a deficient number, since it is larger than the sum of its proper divisors (109328776).

142226444 is an equidigital number, since it uses as much as digits as its factorization.

142226444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3977 (or 3878 counting only the distinct ones).

The product of its digits is 12288, while the sum is 29.

The square root of 142226444 is about 11925.8728820997. The cubic root of 142226444 is about 521.9875170114.

Adding to 142226444 its reverse (444622241), we get a palindrome (586848685).

The spelling of 142226444 in words is "one hundred forty-two million, two hundred twenty-six thousand, four hundred forty-four".