1085491785 has 64 divisors (see below), whose sum is σ = 2119569408. Its totient is φ = 463567104.

The previous prime is 1085491783. The next prime is 1085491801. The reversal of 1085491785 is 5871945801.

It is a happy number.

It is not a de Polignac number, because 1085491785 - 2¹ = 1085491783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1085491783) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 98619 + ... + 109071.

It is an arithmetic number, because the mean of its divisors is an integer number (33118272).

Almost surely, 2^1085491785 is an apocalyptic number.

1085491785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1085491785 is a deficient number, since it is larger than the sum of its proper divisors (1034077623).

1085491785 is a wasteful number, since it uses less digits than its factorization.

1085491785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10534.

The product of its (nonzero) digits is 403200, while the sum is 48.

The square root of 1085491785 is about 32946.8023486347. The cubic root of 1085491785 is about 1027.7216694268.

The spelling of 1085491785 in words is "one billion, eighty-five million, four hundred ninety-one thousand, seven hundred eighty-five".