1056561061 has 2 divisors, whose sum is σ = 1056561062. Its totient is φ = 1056561060.

The previous prime is 1056561059. The next prime is 1056561073. The reversal of 1056561061 is 1601656501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 630964161 + 425596900 = 25119^2 + 20630^2 .

It is a cyclic number.

It is not a de Polignac number, because 1056561061 - 2¹ = 1056561059 is a prime.

It is a super-2 number, since 2×1056561061² = 2232642551242891442, which contains 22 as substring.

Together with 1056561059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1056561091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528280530 + 528280531.

It is an arithmetic number, because the mean of its divisors is an integer number (528280531).

Almost surely, 2^1056561061 is an apocalyptic number.

It is an amenable number.

1056561061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056561061 is an equidigital number, since it uses as much as digits as its factorization.

1056561061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1056561061 is about 32504.7852015669. The cubic root of 1056561061 is about 1018.5089906451.

The spelling of 1056561061 in words is "one billion, fifty-six million, five hundred sixty-one thousand, sixty-one".