1286368961 has 2 divisors, whose sum is σ = 1286368962. Its totient is φ = 1286368960.

The previous prime is 1286368933. The next prime is 1286368969. The reversal of 1286368961 is 1698636821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1091905936 + 194463025 = 33044^2 + 13945^2 .

It is a cyclic number.

It is not a de Polignac number, because 1286368961 - 2¹⁴ = 1286352577 is a prime.

It is not a weakly prime, because it can be changed into another prime (1286368969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643184480 + 643184481.

It is an arithmetic number, because the mean of its divisors is an integer number (643184481).

Almost surely, 2^1286368961 is an apocalyptic number.

It is an amenable number.

1286368961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286368961 is an equidigital number, since it uses as much as digits as its factorization.

1286368961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 50.

The square root of 1286368961 is about 35865.9861289216. The cubic root of 1286368961 is about 1087.5649034413.

The spelling of 1286368961 in words is "one billion, two hundred eighty-six million, three hundred sixty-eight thousand, nine hundred sixty-one".