1068570721 has 9 divisors (see below), whose sum is σ = 1082913849. Its totient is φ = 1054416384.

The previous prime is 1068570667. The next prime is 1068570793. The reversal of 1068570721 is 1270758601.

The square root of 1068570721 is 32689.

It is a perfect power (a square), and thus also a powerful number.

1068570721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 87628321 + 980942400 = 9361^2 + 31320^2 .

It is not a de Polignac number, because 1068570721 - 2¹⁷ = 1068439649 is a prime.

It is a super-2 number, since 2×1068570721² = 2283686771556919682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1068574721) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3170665 + ... + 3171001.

It is an arithmetic number, because the mean of its divisors is an integer number (120323761).

Almost surely, 2^1068570721 is an apocalyptic number.

1068570721 is the 32689-th square number.

1068570721 is the 16345-th centered octagonal number.

It is an amenable number.

1068570721 is a deficient number, since it is larger than the sum of its proper divisors (14343128).

1068570721 is an frugal number, since it uses more digits than its factorization.

1068570721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868 (or 434 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 37.

The cubic root of 1068570721 is about 1022.3535046369.

It can be divided in two parts, 10685 and 70721, that added together give a triangular number (81406 = T₄₀₃).

The spelling of 1068570721 in words is "one billion, sixty-eight million, five hundred seventy thousand, seven hundred twenty-one".