1230781361 has 2 divisors, whose sum is σ = 1230781362. Its totient is φ = 1230781360.

The previous prime is 1230781333. The next prime is 1230781397. The reversal of 1230781361 is 1631870321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1060739761 + 170041600 = 32569^2 + 13040^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230781361 - 2¹⁰ = 1230780337 is a prime.

It is not a weakly prime, because it can be changed into another prime (1230781961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615390680 + 615390681.

It is an arithmetic number, because the mean of its divisors is an integer number (615390681).

Almost surely, 2^1230781361 is an apocalyptic number.

It is an amenable number.

1230781361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230781361 is an equidigital number, since it uses as much as digits as its factorization.

1230781361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1230781361 is about 35082.4936542430. The cubic root of 1230781361 is about 1071.6681003711.

The spelling of 1230781361 in words is "one billion, two hundred thirty million, seven hundred eighty-one thousand, three hundred sixty-one".