12480781 has 2 divisors, whose sum is σ = 12480782. Its totient is φ = 12480780.

The previous prime is 12480779. The next prime is 12480823. The reversal of 12480781 is 18708421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12460900 + 19881 = 3530^2 + 141^2 .

It is a cyclic number.

It is not a de Polignac number, because 12480781 - 2¹ = 12480779 is a prime.

It is a super-2 number, since 2×12480781² = 311539788739922, which contains 22 as substring.

Together with 12480779, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12480751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6240390 + 6240391.

It is an arithmetic number, because the mean of its divisors is an integer number (6240391).

Almost surely, 2^12480781 is an apocalyptic number.

It is an amenable number.

12480781 is a deficient number, since it is larger than the sum of its proper divisors (1).

12480781 is an equidigital number, since it uses as much as digits as its factorization.

12480781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 12480781 is about 3532.8148833473. The cubic root of 12480781 is about 231.9604384088.

The spelling of 12480781 in words is "twelve million, four hundred eighty thousand, seven hundred eighty-one".