1082685721 has 8 divisors (see below), whose sum is σ = 1227336320. Its totient is φ = 946801872.

The previous prime is 1082685719. The next prime is 1082685731. The reversal of 1082685721 is 1275862801.

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 1082685721 - 2¹ = 1082685719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1082685701) 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, 2191425 + ... + 2191918.

It is an arithmetic number, because the mean of its divisors is an integer number (153417040).

Almost surely, 2^1082685721 is an apocalyptic number.

It is an amenable number.

1082685721 is a deficient number, since it is larger than the sum of its proper divisors (144650599).

1082685721 is a wasteful number, since it uses less digits than its factorization.

1082685721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4383375.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 1082685721 is about 32904.1900219410. The cubic root of 1082685721 is about 1026.8353303581.

The spelling of 1082685721 in words is "one billion, eighty-two million, six hundred eighty-five thousand, seven hundred twenty-one".