1056661043 has 2 divisors, whose sum is σ = 1056661044. Its totient is φ = 1056661042.

The previous prime is 1056661033. The next prime is 1056661049. The reversal of 1056661043 is 3401666501.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1056661043 is a prime.

It is a super-2 number, since 2×1056661043² = 2233065119587695698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1056661049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528330521 + 528330522.

It is an arithmetic number, because the mean of its divisors is an integer number (528330522).

Almost surely, 2^1056661043 is an apocalyptic number.

1056661043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056661043 is an equidigital number, since it uses as much as digits as its factorization.

1056661043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 1056661043 is about 32506.3231233556. The cubic root of 1056661043 is about 1018.5411166804.

The spelling of 1056661043 in words is "one billion, fifty-six million, six hundred sixty-one thousand, forty-three".