1055665081 has 3 divisors (see below), whose sum is σ = 1055697573. Its totient is φ = 1055632590.

The previous prime is 1055665069. The next prime is 1055665129. The reversal of 1055665081 is 1805665501.

The square root of 1055665081 is 32491.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1055665081 - 2¹⁵ = 1055632313 is a prime.

It is a super-2 number, since 2×1055665081² = 2228857526485473122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1055665081.

It is not an unprimeable number, because it can be changed into a prime (1055665001) 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 2 ways as a sum of consecutive naturals, for example, 16246 + ... + 48736.

It is an arithmetic number, because the mean of its divisors is an integer number (351899191).

Almost surely, 2^1055665081 is an apocalyptic number.

1055665081 is the 32491-st square number.

1055665081 is the 16246-th centered octagonal number.

It is an amenable number.

1055665081 is a deficient number, since it is larger than the sum of its proper divisors (32492).

1055665081 is an frugal number, since it uses more digits than its factorization.

1055665081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64982 (or 32491 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 37.

The cubic root of 1055665081 is about 1018.2210054711.

The spelling of 1055665081 in words is "one billion, fifty-five million, six hundred sixty-five thousand, eighty-one".