142000221 has 16 divisors (see below), whose sum is σ = 207820800. Its totient is φ = 85529520.

The previous prime is 142000169. The next prime is 142000241. The reversal of 142000221 is 122000241.

It is not a de Polignac number, because 142000221 - 2⁹ = 141999709 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 142000197 and 142000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142000241) 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 15 ways as a sum of consecutive naturals, for example, 7821 + ... + 18578.

It is an arithmetic number, because the mean of its divisors is an integer number (12988800).

Almost surely, 2^142000221 is an apocalyptic number.

142000221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

142000221 is a deficient number, since it is larger than the sum of its proper divisors (65820579).

142000221 is a wasteful number, since it uses less digits than its factorization.

142000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26576.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 142000221 is about 11916.3845607634. The cubic root of 142000221 is about 521.7106152800.

Adding to 142000221 its reverse (122000241), we get a palindrome (264000462).

The spelling of 142000221 in words is "one hundred forty-two million, two hundred twenty-one", and thus it is an aban number.