142220324 has 6 divisors (see below), whose sum is σ = 248885574. Its totient is φ = 71110160.

The previous prime is 142220311. The next prime is 142220327. The reversal of 142220324 is 423022241.

It can be written as a sum of positive squares in only one way, i.e., 135303424 + 6916900 = 11632^2 + 2630^2 .

It is a junction number, because it is equal to n+sod(n) for n = 142220296 and 142220305.

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 as a sum of consecutive naturals, namely, 17777537 + ... + 17777544.

It is an arithmetic number, because the mean of its divisors is an integer number (41480929).

Almost surely, 2^142220324 is an apocalyptic number.

It is an amenable number.

142220324 is a deficient number, since it is larger than the sum of its proper divisors (106665250).

142220324 is a wasteful number, since it uses less digits than its factorization.

142220324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35555085 (or 35555083 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 142220324 is about 11925.6162943472. The cubic root of 142220324 is about 521.9800298678.

Adding to 142220324 its reverse (423022241), we get a palindrome (565242565).

The spelling of 142220324 in words is "one hundred forty-two million, two hundred twenty thousand, three hundred twenty-four".