1285678307 has 2 divisors, whose sum is σ = 1285678308. Its totient is φ = 1285678306.

The previous prime is 1285678291. The next prime is 1285678313. The reversal of 1285678307 is 7038765821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1285678307 - 2⁴ = 1285678291 is a prime.

It is not a weakly prime, because it can be changed into another prime (1285678367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642839153 + 642839154.

It is an arithmetic number, because the mean of its divisors is an integer number (642839154).

Almost surely, 2^1285678307 is an apocalyptic number.

1285678307 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285678307 is an equidigital number, since it uses as much as digits as its factorization.

1285678307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 564480, while the sum is 47.

The square root of 1285678307 is about 35856.3565773211. The cubic root of 1285678307 is about 1087.3702300255.

The spelling of 1285678307 in words is "one billion, two hundred eighty-five million, six hundred seventy-eight thousand, three hundred seven".