1075672721 has 2 divisors, whose sum is σ = 1075672722. Its totient is φ = 1075672720.

The previous prime is 1075672711. The next prime is 1075672723. The reversal of 1075672721 is 1272765701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1065304321 + 10368400 = 32639^2 + 3220^2 .

It is a cyclic number.

It is not a de Polignac number, because 1075672721 - 2¹⁸ = 1075410577 is a prime.

Together with 1075672723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1075672723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 537836360 + 537836361.

It is an arithmetic number, because the mean of its divisors is an integer number (537836361).

Almost surely, 2^1075672721 is an apocalyptic number.

It is an amenable number.

1075672721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1075672721 is an equidigital number, since it uses as much as digits as its factorization.

1075672721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41160, while the sum is 38.

The square root of 1075672721 is about 32797.4499161139. The cubic root of 1075672721 is about 1024.6134480536.

The spelling of 1075672721 in words is "one billion, seventy-five million, six hundred seventy-two thousand, seven hundred twenty-one".