1081575986 has 4 divisors (see below), whose sum is σ = 1622363982. Its totient is φ = 540787992.

The previous prime is 1081575977. The next prime is 1081576021. The reversal of 1081575986 is 6895751801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1067655625 + 13920361 = 32675^2 + 3731^2 .

It is a super-2 number, since 2×1081575986² = 2339613226983744392, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 270393995 + ... + 270393998.

Almost surely, 2^1081575986 is an apocalyptic number.

1081575986 is a deficient number, since it is larger than the sum of its proper divisors (540787996).

1081575986 is an equidigital number, since it uses as much as digits as its factorization.

1081575986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540787995.

The product of its (nonzero) digits is 604800, while the sum is 50.

The square root of 1081575986 is about 32887.3225726875. The cubic root of 1081575986 is about 1026.4843806679.

The spelling of 1081575986 in words is "one billion, eighty-one million, five hundred seventy-five thousand, nine hundred eighty-six".