1056055621 has 2 divisors, whose sum is σ = 1056055622. Its totient is φ = 1056055620.

The previous prime is 1056055613. The next prime is 1056055661. The reversal of 1056055621 is 1265506501.

1056055621 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., 620707396 + 435348225 = 24914^2 + 20865^2 .

It is a cyclic number.

It is not a de Polignac number, because 1056055621 - 2³ = 1056055613 is a prime.

It is a super-3 number, since 3×1056055621³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1056055661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528027810 + 528027811.

It is an arithmetic number, because the mean of its divisors is an integer number (528027811).

Almost surely, 2^1056055621 is an apocalyptic number.

It is an amenable number.

1056055621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056055621 is an equidigital number, since it uses as much as digits as its factorization.

1056055621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 1056055621 is about 32497.0094162524. The cubic root of 1056055621 is about 1018.3465525508.

The spelling of 1056055621 in words is "one billion, fifty-six million, fifty-five thousand, six hundred twenty-one".