1055872561 has 4 divisors (see below), whose sum is σ = 1059006052. Its totient is φ = 1052739072.

The previous prime is 1055872547. The next prime is 1055872577. The reversal of 1055872561 is 1652785501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1652785501 = 1699 ⋅972799.

It can be written as a sum of positive squares in 2 ways, for example, as 331240000 + 724632561 = 18200^2 + 26919^2 .

It is a cyclic number.

It is not a de Polignac number, because 1055872561 - 2¹¹ = 1055870513 is a prime.

It is a super-2 number, since 2×1055872561² = 2229733730145397442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1055872591) 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 in 3 ways as a sum of consecutive naturals, for example, 1566240 + ... + 1566913.

It is an arithmetic number, because the mean of its divisors is an integer number (264751513).

Almost surely, 2^1055872561 is an apocalyptic number.

It is an amenable number.

1055872561 is a deficient number, since it is larger than the sum of its proper divisors (3133491).

1055872561 is an equidigital number, since it uses as much as digits as its factorization.

1055872561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3133490.

The product of its (nonzero) digits is 84000, while the sum is 40.

The square root of 1055872561 is about 32494.1927273167. The cubic root of 1055872561 is about 1018.2877080201.

The spelling of 1055872561 in words is "one billion, fifty-five million, eight hundred seventy-two thousand, five hundred sixty-one".