1286421707 has 2 divisors, whose sum is σ = 1286421708. Its totient is φ = 1286421706.

The previous prime is 1286421691. The next prime is 1286421709. The reversal of 1286421707 is 7071246821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1286421707 - 2⁴ = 1286421691 is a prime.

Together with 1286421709, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1286421709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643210853 + 643210854.

It is an arithmetic number, because the mean of its divisors is an integer number (643210854).

Almost surely, 2^1286421707 is an apocalyptic number.

1286421707 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286421707 is an equidigital number, since it uses as much as digits as its factorization.

1286421707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 1286421707 is about 35866.7214420276. The cubic root of 1286421707 is about 1087.5797679984.

The spelling of 1286421707 in words is "one billion, two hundred eighty-six million, four hundred twenty-one thousand, seven hundred seven".