142410221 has 2 divisors, whose sum is σ = 142410222. Its totient is φ = 142410220.

The previous prime is 142410211. The next prime is 142410223. The reversal of 142410221 is 122014241.

142410221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110544196 + 31866025 = 10514^2 + 5645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142410221 is a prime.

Together with 142410223, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142410221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142410223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71205110 + 71205111.

It is an arithmetic number, because the mean of its divisors is an integer number (71205111).

Almost surely, 2^142410221 is an apocalyptic number.

It is an amenable number.

142410221 is a deficient number, since it is larger than the sum of its proper divisors (1).

142410221 is an equidigital number, since it uses as much as digits as its factorization.

142410221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 142410221 is about 11933.5753653295. The cubic root of 142410221 is about 522.2122478671.

Adding to 142410221 its reverse (122014241), we get a palindrome (264424462).

The spelling of 142410221 in words is "one hundred forty-two million, four hundred ten thousand, two hundred twenty-one".