142001224 has 16 divisors (see below), whose sum is σ = 268610220. Its totient is φ = 70371840.

The previous prime is 142001213. The next prime is 142001239. The reversal of 142001224 is 422100241.

It can be written as a sum of positive squares in 2 ways, for example, as 90592324 + 51408900 = 9518^2 + 7170^2 .

It is a junction number, because it is equal to n+sod(n) for n = 142001198 and 142001207.

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 3 ways as a sum of consecutive naturals, for example, 77637 + ... + 79444.

Almost surely, 2^142001224 is an apocalyptic number.

It is an amenable number.

142001224 is a deficient number, since it is larger than the sum of its proper divisors (126608996).

142001224 is a wasteful number, since it uses less digits than its factorization.

142001224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157200 (or 157196 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 142001224 is about 11916.4266456014. The cubic root of 142001224 is about 521.7118436220.

Adding to 142001224 its reverse (422100241), we get a palindrome (564101465).

The spelling of 142001224 in words is "one hundred forty-two million, one thousand, two hundred twenty-four".