1056001081 has 4 divisors (see below), whose sum is σ = 1090065664. Its totient is φ = 1021936500.

The previous prime is 1056001061. The next prime is 1056001117. The reversal of 1056001081 is 1801006501.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1801006501 = 7 ⋅257286643.

It is a cyclic number.

It is not a de Polignac number, because 1056001081 - 2¹⁵ = 1055968313 is a prime.

It is a super-2 number, since 2×1056001081² = 2230276566146337122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1056001031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17032245 + ... + 17032306.

It is an arithmetic number, because the mean of its divisors is an integer number (272516416).

Almost surely, 2^1056001081 is an apocalyptic number.

It is an amenable number.

1056001081 is a deficient number, since it is larger than the sum of its proper divisors (34064583).

1056001081 is an equidigital number, since it uses as much as digits as its factorization.

1056001081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34064582.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 1056001081 is about 32496.1702512773. The cubic root of 1056001081 is about 1018.3290214107.

Adding to 1056001081 its reverse (1801006501), we get a palindrome (2857007582).

The spelling of 1056001081 in words is "one billion, fifty-six million, one thousand, eighty-one".