1027042985 has 4 divisors (see below), whose sum is σ = 1232451588. Its totient is φ = 821634384.

The previous prime is 1027042969. The next prime is 1027042987. The reversal of 1027042985 is 5892407201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5892407201 = 23029 ⋅255869.

It can be written as a sum of positive squares in 2 ways, for example, as 743053081 + 283989904 = 27259^2 + 16852^2 .

It is a cyclic number.

It is not a de Polignac number, because 1027042985 - 2⁴ = 1027042969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1027042987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102704294 + ... + 102704303.

It is an arithmetic number, because the mean of its divisors is an integer number (308112897).

Almost surely, 2^1027042985 is an apocalyptic number.

It is an amenable number.

1027042985 is a deficient number, since it is larger than the sum of its proper divisors (205408603).

1027042985 is an equidigital number, since it uses as much as digits as its factorization.

1027042985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205408602.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 1027042985 is about 32047.5113698396. The cubic root of 1027042985 is about 1008.9342694481.

The spelling of 1027042985 in words is "one billion, twenty-seven million, forty-two thousand, nine hundred eighty-five".