1285885927 has 2 divisors, whose sum is σ = 1285885928. Its totient is φ = 1285885926.

The previous prime is 1285885919. The next prime is 1285885949. The reversal of 1285885927 is 7295885821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1285885927 - 2³ = 1285885919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285885907) 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, 642942963 + 642942964.

It is an arithmetic number, because the mean of its divisors is an integer number (642942964).

Almost surely, 2^1285885927 is an apocalyptic number.

1285885927 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285885927 is an equidigital number, since it uses as much as digits as its factorization.

1285885927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3225600, while the sum is 55.

The square root of 1285885927 is about 35859.2516235350. The cubic root of 1285885927 is about 1087.4287588334.

The spelling of 1285885927 in words is "one billion, two hundred eighty-five million, eight hundred eighty-five thousand, nine hundred twenty-seven".