142201421 has 2 divisors, whose sum is σ = 142201422. Its totient is φ = 142201420.

The previous prime is 142201399. The next prime is 142201439. The reversal of 142201421 is 124102241.

142201421 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., 107226025 + 34975396 = 10355^2 + 5914^2 .

It is a cyclic number.

It is not a de Polignac number, because 142201421 - 2¹⁰ = 142200397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142201421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142204421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71100710 + 71100711.

It is an arithmetic number, because the mean of its divisors is an integer number (71100711).

Almost surely, 2^142201421 is an apocalyptic number.

It is an amenable number.

142201421 is a deficient number, since it is larger than the sum of its proper divisors (1).

142201421 is an equidigital number, since it uses as much as digits as its factorization.

142201421 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 142201421 is about 11924.8237303534. The cubic root of 142201421 is about 521.9569027801.

Adding to 142201421 its reverse (124102241), we get a palindrome (266303662).

The spelling of 142201421 in words is "one hundred forty-two million, two hundred one thousand, four hundred twenty-one".