104242513 has 2 divisors, whose sum is σ = 104242514. Its totient is φ = 104242512.

The previous prime is 104242499. The next prime is 104242519. The reversal of 104242513 is 315242401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74080449 + 30162064 = 8607^2 + 5492^2 .

It is an emirp because it is prime and its reverse (315242401) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104242513 is a prime.

It is not a weakly prime, because it can be changed into another prime (104242519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52121256 + 52121257.

It is an arithmetic number, because the mean of its divisors is an integer number (52121257).

Almost surely, 2^104242513 is an apocalyptic number.

It is an amenable number.

104242513 is a deficient number, since it is larger than the sum of its proper divisors (1).

104242513 is an equidigital number, since it uses as much as digits as its factorization.

104242513 is an evil number, because the sum of its binary digits is even.

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

The square root of 104242513 is about 10209.9222817806. The cubic root of 104242513 is about 470.6321853465.

Adding to 104242513 its reverse (315242401), we get a palindrome (419484914).

The spelling of 104242513 in words is "one hundred four million, two hundred forty-two thousand, five hundred thirteen".