1085201891 has 8 divisors (see below), whose sum is σ = 1142904000. Its totient is φ = 1027558440.

The previous prime is 1085201863. The next prime is 1085201911. The reversal of 1085201891 is 1981025801.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1085201891 - 2⁶ = 1085201827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1085201791) 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 7 ways as a sum of consecutive naturals, for example, 26276 + ... + 53486.

It is an arithmetic number, because the mean of its divisors is an integer number (142863000).

Almost surely, 2^1085201891 is an apocalyptic number.

1085201891 is a deficient number, since it is larger than the sum of its proper divisors (57702109).

1085201891 is a wasteful number, since it uses less digits than its factorization.

1085201891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29329.

The product of its (nonzero) digits is 5760, while the sum is 35.

The square root of 1085201891 is about 32942.4026294379. The cubic root of 1085201891 is about 1027.6301726890.

The spelling of 1085201891 in words is "one billion, eighty-five million, two hundred one thousand, eight hundred ninety-one".