142003221 has 4 divisors (see below), whose sum is σ = 189337632. Its totient is φ = 94668812.

The previous prime is 142003171. The next prime is 142003223. The reversal of 142003221 is 122300241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 142003221 - 2⁹ = 142002709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142003221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142003223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23667201 + ... + 23667206.

It is an arithmetic number, because the mean of its divisors is an integer number (47334408).

Almost surely, 2^142003221 is an apocalyptic number.

It is an amenable number.

142003221 is a deficient number, since it is larger than the sum of its proper divisors (47334411).

142003221 is an equidigital number, since it uses as much as digits as its factorization.

142003221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47334410.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 142003221 is about 11916.5104372043. The cubic root of 142003221 is about 521.7142892669.

Adding to 142003221 its reverse (122300241), we get a palindrome (264303462).

The spelling of 142003221 in words is "one hundred forty-two million, three thousand, two hundred twenty-one".