1085809874 has 4 divisors (see below), whose sum is σ = 1628714814. Its totient is φ = 542904936.

The previous prime is 1085809871. The next prime is 1085809877. The reversal of 1085809874 is 4789085801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4789085801 = 61813 ⋅77477.

It is an interprime number because it is at equal distance from previous prime (1085809871) and next prime (1085809877).

It can be written as a sum of positive squares in only one way, i.e., 1034587225 + 51222649 = 32165^2 + 7157^2 .

It is not an unprimeable number, because it can be changed into a prime (1085809871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271452467 + ... + 271452470.

Almost surely, 2^1085809874 is an apocalyptic number.

1085809874 is a deficient number, since it is larger than the sum of its proper divisors (542904940).

1085809874 is an equidigital number, since it uses as much as digits as its factorization.

1085809874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542904939.

The product of its (nonzero) digits is 645120, while the sum is 50.

The square root of 1085809874 is about 32951.6293072133. The cubic root of 1085809874 is about 1027.8220463668.

The spelling of 1085809874 in words is "one billion, eighty-five million, eight hundred nine thousand, eight hundred seventy-four".