142020224 has 16 divisors (see below), whose sum is σ = 282931170. Its totient is φ = 71010048.

The previous prime is 142020199. The next prime is 142020247. The reversal of 142020224 is 422020241.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 138485824 + 3534400 = 11768^2 + 1880^2 .

It is a tau number, because it is divible by the number of its divisors (16).

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 as a sum of consecutive naturals, namely, 554639 + ... + 554894.

Almost surely, 2^142020224 is an apocalyptic number.

It is an amenable number.

142020224 is a deficient number, since it is larger than the sum of its proper divisors (140910946).

142020224 is an equidigital number, since it uses as much as digits as its factorization.

142020224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109547 (or 1109535 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 142020224 is about 11917.2238377904. The cubic root of 142020224 is about 521.7351112219.

Adding to 142020224 its sum of digits (17), we get a palindrome (142020241).

Adding to 142020224 its reverse (422020241), we get a palindrome (564040465).

The spelling of 142020224 in words is "one hundred forty-two million, twenty thousand, two hundred twenty-four".