1056100561 has 2 divisors, whose sum is σ = 1056100562. Its totient is φ = 1056100560.

The previous prime is 1056100553. The next prime is 1056100601. The reversal of 1056100561 is 1650016501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 879715600 + 176384961 = 29660^2 + 13281^2 .

It is a cyclic number.

It is not a de Polignac number, because 1056100561 - 2³ = 1056100553 is a prime.

It is a super-2 number, since 2×1056100561² = 2230696789889029442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1056100501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528050280 + 528050281.

It is an arithmetic number, because the mean of its divisors is an integer number (528050281).

Almost surely, 2^1056100561 is an apocalyptic number.

It is an amenable number.

1056100561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056100561 is an equidigital number, since it uses as much as digits as its factorization.

1056100561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 1056100561 is about 32497.7008571376. The cubic root of 1056100561 is about 1018.3609974481.

The spelling of 1056100561 in words is "one billion, fifty-six million, one hundred thousand, five hundred sixty-one".