12780113 has 2 divisors, whose sum is σ = 12780114. Its totient is φ = 12780112.

The previous prime is 12780017. The next prime is 12780121. The reversal of 12780113 is 31108721.

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., 12159169 + 620944 = 3487^2 + 788^2 .

It is a cyclic number.

It is not a de Polignac number, because 12780113 - 2¹⁰ = 12779089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12780143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6390056 + 6390057.

It is an arithmetic number, because the mean of its divisors is an integer number (6390057).

Almost surely, 2^12780113 is an apocalyptic number.

It is an amenable number.

12780113 is a deficient number, since it is larger than the sum of its proper divisors (1).

12780113 is an equidigital number, since it uses as much as digits as its factorization.

12780113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 12780113 is about 3574.9283908912. The cubic root of 12780113 is about 233.8002105527.

Adding to 12780113 its reverse (31108721), we get a palindrome (43888834).

The spelling of 12780113 in words is "twelve million, seven hundred eighty thousand, one hundred thirteen".