1056052506521 has 2 divisors, whose sum is σ = 1056052506522. Its totient is φ = 1056052506520.

The previous prime is 1056052506499. The next prime is 1056052506599. The reversal of 1056052506521 is 1256052506501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 887620242496 + 168432264025 = 942136^2 + 410405^2 .

It is a cyclic number.

It is not a de Polignac number, because 1056052506521 - 2¹⁴ = 1056052490137 is a prime.

It is a super-2 number, since 2×1056052506521² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1056052506221) 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 as a sum of consecutive naturals, namely, 528026253260 + 528026253261.

It is an arithmetic number, because the mean of its divisors is an integer number (528026253261).

Almost surely, 2^{1056052506521} is an apocalyptic number.

It is an amenable number.

1056052506521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056052506521 is an equidigital number, since it uses as much as digits as its factorization.

1056052506521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90000, while the sum is 38.

The spelling of 1056052506521 in words is "one trillion, fifty-six billion, fifty-two million, five hundred six thousand, five hundred twenty-one".