1085112721 has 8 divisors (see below), whose sum is σ = 1352867904. Its totient is φ = 845542320.

The previous prime is 1085112689. The next prime is 1085112731. The reversal of 1085112721 is 1272115801.

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

It is not a de Polignac number, because 1085112721 - 2⁵ = 1085112689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1085112721.

It is not an unprimeable number, because it can be changed into a prime (1085112731) 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 in 7 ways as a sum of consecutive naturals, for example, 7046110 + ... + 7046263.

It is an arithmetic number, because the mean of its divisors is an integer number (169108488).

Almost surely, 2^1085112721 is an apocalyptic number.

1085112721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1085112721 is a deficient number, since it is larger than the sum of its proper divisors (267755183).

1085112721 is a wasteful number, since it uses less digits than its factorization.

1085112721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14092391.

The product of its (nonzero) digits is 1120, while the sum is 28.

The square root of 1085112721 is about 32941.0491787982. The cubic root of 1085112721 is about 1027.6020254557.

The spelling of 1085112721 in words is "one billion, eighty-five million, one hundred twelve thousand, seven hundred twenty-one".