1261482320873 has 2 divisors, whose sum is σ = 1261482320874. Its totient is φ = 1261482320872.

The previous prime is 1261482320863. The next prime is 1261482320899. The reversal of 1261482320873 is 3780232841621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 751989011929 + 509493308944 = 867173^2 + 713788^2 .

It is a cyclic number.

It is not a de Polignac number, because 1261482320873 - 2¹⁸ = 1261482058729 is a prime.

It is not a weakly prime, because it can be changed into another prime (1261482320863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630741160436 + 630741160437.

It is an arithmetic number, because the mean of its divisors is an integer number (630741160437).

Almost surely, 2^{1261482320873} is an apocalyptic number.

It is an amenable number.

1261482320873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1261482320873 is an equidigital number, since it uses as much as digits as its factorization.

1261482320873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 1261482320873 in words is "one trillion, two hundred sixty-one billion, four hundred eighty-two million, three hundred twenty thousand, eight hundred seventy-three".