1085251785 has 16 divisors (see below), whose sum is σ = 1827792960. Its totient is φ = 548337600.

The previous prime is 1085251771. The next prime is 1085251801. The reversal of 1085251785 is 5871525801.

It is not a de Polignac number, because 1085251785 - 2⁶ = 1085251721 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1903666 + ... + 1904235.

It is an arithmetic number, because the mean of its divisors is an integer number (114237060).

Almost surely, 2^1085251785 is an apocalyptic number.

1085251785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1085251785 is a deficient number, since it is larger than the sum of its proper divisors (742541175).

1085251785 is a wasteful number, since it uses less digits than its factorization.

1085251785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3807928.

The product of its (nonzero) digits is 112000, while the sum is 42.

The square root of 1085251785 is about 32943.1599121881. The cubic root of 1085251785 is about 1027.6459214618.

The spelling of 1085251785 in words is "one billion, eighty-five million, two hundred fifty-one thousand, seven hundred eighty-five".