1286409049 has 2 divisors, whose sum is σ = 1286409050. Its totient is φ = 1286409048.

The previous prime is 1286409031. The next prime is 1286409073. The reversal of 1286409049 is 9409046821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1021761225 + 264647824 = 31965^2 + 16268^2 .

It is a cyclic number.

It is not a de Polignac number, because 1286409049 - 2⁵ = 1286409017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1286408996 and 1286409014.

It is not a weakly prime, because it can be changed into another prime (1286409349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643204524 + 643204525.

It is an arithmetic number, because the mean of its divisors is an integer number (643204525).

Almost surely, 2^1286409049 is an apocalyptic number.

It is an amenable number.

1286409049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286409049 is an equidigital number, since it uses as much as digits as its factorization.

1286409049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 1286409049 is about 35866.5449827552. The cubic root of 1286409049 is about 1087.5762008348.

The spelling of 1286409049 in words is "one billion, two hundred eighty-six million, four hundred nine thousand, forty-nine".