1085731787 has 16 divisors (see below), whose sum is σ = 1261020672. Its totient is φ = 915546240.

The previous prime is 1085731771. The next prime is 1085731849. The reversal of 1085731787 is 7871375801.

It is not a de Polignac number, because 1085731787 - 2⁴ = 1085731771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1085731187) 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 in 15 ways as a sum of consecutive naturals, for example, 257843 + ... + 262019.

It is an arithmetic number, because the mean of its divisors is an integer number (78813792).

Almost surely, 2^1085731787 is an apocalyptic number.

1085731787 is a deficient number, since it is larger than the sum of its proper divisors (175288885).

1085731787 is an equidigital number, since it uses as much as digits as its factorization.

1085731787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4778.

The product of its (nonzero) digits is 329280, while the sum is 47.

The square root of 1085731787 is about 32950.4444127845. Note that the first 4 decimals coincide. The cubic root of 1085731787 is about 1027.7974068585.

The spelling of 1085731787 in words is "one billion, eighty-five million, seven hundred thirty-one thousand, seven hundred eighty-seven".