142236613 has 2 divisors, whose sum is σ = 142236614. Its totient is φ = 142236612.

The previous prime is 142236593. The next prime is 142236697. The reversal of 142236613 is 316632241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113912929 + 28323684 = 10673^2 + 5322^2 .

It is an emirp because it is prime and its reverse (316632241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142236613 - 2⁵ = 142236581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142236713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71118306 + 71118307.

It is an arithmetic number, because the mean of its divisors is an integer number (71118307).

Almost surely, 2^142236613 is an apocalyptic number.

It is an amenable number.

142236613 is a deficient number, since it is larger than the sum of its proper divisors (1).

142236613 is an equidigital number, since it uses as much as digits as its factorization.

142236613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 28.

The square root of 142236613 is about 11926.2992164376. The cubic root of 142236613 is about 521.9999571840. Note that the first 4 decimals are identical.

Adding to 142236613 its reverse (316632241), we get a palindrome (458868854).

The spelling of 142236613 in words is "one hundred forty-two million, two hundred thirty-six thousand, six hundred thirteen".