142279321 has 2 divisors, whose sum is σ = 142279322. Its totient is φ = 142279320.

The previous prime is 142279301. The next prime is 142279327. The reversal of 142279321 is 123972241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116877721 + 25401600 = 10811^2 + 5040^2 .

It is an emirp because it is prime and its reverse (123972241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142279321 - 2¹¹ = 142277273 is a prime.

It is not a weakly prime, because it can be changed into another prime (142279327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71139660 + 71139661.

It is an arithmetic number, because the mean of its divisors is an integer number (71139661).

Almost surely, 2^142279321 is an apocalyptic number.

It is an amenable number.

142279321 is a deficient number, since it is larger than the sum of its proper divisors (1).

142279321 is an equidigital number, since it uses as much as digits as its factorization.

142279321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 142279321 is about 11928.0895788051. The cubic root of 142279321 is about 522.0521972339.

The spelling of 142279321 in words is "one hundred forty-two million, two hundred seventy-nine thousand, three hundred twenty-one".