252142321 has 2 divisors, whose sum is σ = 252142322. Its totient is φ = 252142320.

The previous prime is 252142291. The next prime is 252142339. The reversal of 252142321 is 123241252.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226081296 + 26061025 = 15036^2 + 5105^2 .

It is a cyclic number.

It is not a de Polignac number, because 252142321 - 2⁷ = 252142193 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 252142292 and 252142301.

It is not a weakly prime, because it can be changed into another prime (252142361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126071160 + 126071161.

It is an arithmetic number, because the mean of its divisors is an integer number (126071161).

Almost surely, 2^252142321 is an apocalyptic number.

It is an amenable number.

252142321 is a deficient number, since it is larger than the sum of its proper divisors (1).

252142321 is an equidigital number, since it uses as much as digits as its factorization.

252142321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 22.

The square root of 252142321 is about 15878.9899237955. The cubic root of 252142321 is about 631.7548461989.

Adding to 252142321 its reverse (123241252), we get a palindrome (375383573).

The spelling of 252142321 in words is "two hundred fifty-two million, one hundred forty-two thousand, three hundred twenty-one".