1056430217 has 2 divisors, whose sum is σ = 1056430218. Its totient is φ = 1056430216.

The previous prime is 1056430213. The next prime is 1056430259. The reversal of 1056430217 is 7120346501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 728784016 + 327646201 = 26996^2 + 18101^2 .

It is a cyclic number.

It is not a de Polignac number, because 1056430217 - 2² = 1056430213 is a prime.

It is a super-2 number, since 2×1056430217² = 2232089606781334178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1056430217.

It is not a weakly prime, because it can be changed into another prime (1056430213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528215108 + 528215109.

It is an arithmetic number, because the mean of its divisors is an integer number (528215109).

Almost surely, 2^1056430217 is an apocalyptic number.

It is an amenable number.

1056430217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056430217 is an equidigital number, since it uses as much as digits as its factorization.

1056430217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 1056430217 is about 32502.7724509772. The cubic root of 1056430217 is about 1018.4669450259.

Adding to 1056430217 its reverse (7120346501), we get a palindrome (8176776718).

The spelling of 1056430217 in words is "one billion, fifty-six million, four hundred thirty thousand, two hundred seventeen".