1056073541521 has 4 divisors (see below), whose sum is σ = 1056079673712. Its totient is φ = 1056067409332.

The previous prime is 1056073541507. The next prime is 1056073541531. The reversal of 1056073541521 is 1251453706501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1056073541521 - 2¹⁷ = 1056073410449 is a prime.

It is a super-2 number, since 2×1056073541521² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1056073541531) 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, 2800075 + ... + 3154768.

It is an arithmetic number, because the mean of its divisors is an integer number (264019918428).

Almost surely, 2^{1056073541521} is an apocalyptic number.

It is an amenable number.

1056073541521 is a deficient number, since it is larger than the sum of its proper divisors (6132191).

1056073541521 is an equidigital number, since it uses as much as digits as its factorization.

1056073541521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6132190.

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 1056073541521 in words is "one trillion, fifty-six billion, seventy-three million, five hundred forty-one thousand, five hundred twenty-one".