1056505211 has 4 divisors (see below), whose sum is σ = 1063596000. Its totient is φ = 1049414424.

The previous prime is 1056505193. The next prime is 1056505217. The reversal of 1056505211 is 1125056501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1125056501 = 1019 ⋅1104079.

It is a cyclic number.

It is not a de Polignac number, because 1056505211 - 2²⁶ = 989396347 is a prime.

It is a super-2 number, since 2×1056505211² = 2232406521740309042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1056505217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3545171 + ... + 3545468.

It is an arithmetic number, because the mean of its divisors is an integer number (265899000).

Almost surely, 2^1056505211 is an apocalyptic number.

1056505211 is a deficient number, since it is larger than the sum of its proper divisors (7090789).

1056505211 is an equidigital number, since it uses as much as digits as its factorization.

1056505211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7090788.

The product of its (nonzero) digits is 1500, while the sum is 26.

The square root of 1056505211 is about 32503.9260859361. The cubic root of 1056505211 is about 1018.4910441419.

The spelling of 1056505211 in words is "one billion, fifty-six million, five hundred five thousand, two hundred eleven".