1055032721 has 2 divisors, whose sum is σ = 1055032722. Its totient is φ = 1055032720.

The previous prime is 1055032717. The next prime is 1055032729. The reversal of 1055032721 is 1272305501.

1055032721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 985960000 + 69072721 = 31400^2 + 8311^2 .

It is a cyclic number.

It is not a de Polignac number, because 1055032721 - 2² = 1055032717 is a prime.

It is a super-2 number, since 2×1055032721² = 2226188084761327682, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1055032729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 527516360 + 527516361.

It is an arithmetic number, because the mean of its divisors is an integer number (527516361).

Almost surely, 2^1055032721 is an apocalyptic number.

It is an amenable number.

1055032721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1055032721 is an equidigital number, since it uses as much as digits as its factorization.

1055032721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 1055032721 is about 32481.2672320524. The cubic root of 1055032721 is about 1018.0176547258.

The spelling of 1055032721 in words is "one billion, fifty-five million, thirty-two thousand, seven hundred twenty-one".