1085782821 has 8 divisors (see below), whose sum is σ = 1461240864. Its totient is φ = 717090000.

The previous prime is 1085782813. The next prime is 1085782883. The reversal of 1085782821 is 1282875801.

1085782821 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1085782821 - 2³ = 1085782813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085782021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1690930 + ... + 1691571.

It is an arithmetic number, because the mean of its divisors is an integer number (182655108).

Almost surely, 2^1085782821 is an apocalyptic number.

It is an amenable number.

1085782821 is a deficient number, since it is larger than the sum of its proper divisors (375458043).

1085782821 is a wasteful number, since it uses less digits than its factorization.

1085782821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3382611.

The product of its (nonzero) digits is 71680, while the sum is 42.

The square root of 1085782821 is about 32951.2188090213. The cubic root of 1085782821 is about 1027.8135102190.

The spelling of 1085782821 in words is "one billion, eighty-five million, seven hundred eighty-two thousand, eight hundred twenty-one".