142220322 has 24 divisors (see below), whose sum is σ = 311198940. Its totient is φ = 46936800.

The previous prime is 142220311. The next prime is 142220327. The reversal of 142220322 is 223022241.

It can be written as a sum of positive squares in 2 ways, for example, as 118396161 + 23824161 = 10881^2 + 4881^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 142220295 and 142220304.

It is not an unprimeable number, because it can be changed into a prime (142220327) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 37297 + ... + 40932.

Almost surely, 2^142220322 is an apocalyptic number.

142220322 is an abundant number, since it is smaller than the sum of its proper divisors (168978618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142220322 is a wasteful number, since it uses less digits than its factorization.

142220322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78338 (or 78335 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 142220322 is about 11925.6162104941. The cubic root of 142220322 is about 521.9800274210.

Adding to 142220322 its reverse (223022241), we get a palindrome (365242563).

The spelling of 142220322 in words is "one hundred forty-two million, two hundred twenty thousand, three hundred twenty-two".