142321513 has 2 divisors, whose sum is σ = 142321514. Its totient is φ = 142321512.

The previous prime is 142321477. The next prime is 142321547. The reversal of 142321513 is 315123241.

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., 140493609 + 1827904 = 11853^2 + 1352^2 .

It is an emirp because it is prime and its reverse (315123241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142321513 is a prime.

It is not a weakly prime, because it can be changed into another prime (142321583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71160756 + 71160757.

It is an arithmetic number, because the mean of its divisors is an integer number (71160757).

Almost surely, 2^142321513 is an apocalyptic number.

It is an amenable number.

142321513 is a deficient number, since it is larger than the sum of its proper divisors (1).

142321513 is an equidigital number, since it uses as much as digits as its factorization.

142321513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 22.

The square root of 142321513 is about 11929.8580460959. The cubic root of 142321513 is about 522.1037958528.

Adding to 142321513 its reverse (315123241), we get a palindrome (457444754).

The spelling of 142321513 in words is "one hundred forty-two million, three hundred twenty-one thousand, five hundred thirteen".