1200981361 has 2 divisors, whose sum is σ = 1200981362. Its totient is φ = 1200981360.

The previous prime is 1200981349. The next prime is 1200981367. The reversal of 1200981361 is 1631890021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1195430625 + 5550736 = 34575^2 + 2356^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200981361 - 2⁵ = 1200981329 is a prime.

It is not a weakly prime, because it can be changed into another prime (1200981367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600490680 + 600490681.

It is an arithmetic number, because the mean of its divisors is an integer number (600490681).

Almost surely, 2^1200981361 is an apocalyptic number.

It is an amenable number.

1200981361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200981361 is an equidigital number, since it uses as much as digits as its factorization.

1200981361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1200981361 is about 34655.1779825180. The cubic root of 1200981361 is about 1062.9481712725.

The spelling of 1200981361 in words is "one billion, two hundred million, nine hundred eighty-one thousand, three hundred sixty-one".