11571081 has 4 divisors (see below), whose sum is σ = 15428112. Its totient is φ = 7714052.

The previous prime is 11571073. The next prime is 11571089. The reversal of 11571081 is 18017511.

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 an interprime number because it is at equal distance from previous prime (11571073) and next prime (11571089).

It is a cyclic number.

It is not a de Polignac number, because 11571081 - 2³ = 11571073 is a prime.

It is a super-2 number, since 2×11571081² = 267779831017122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11571089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1928511 + ... + 1928516.

It is an arithmetic number, because the mean of its divisors is an integer number (3857028).

Almost surely, 2^11571081 is an apocalyptic number.

It is an amenable number.

11571081 is a deficient number, since it is larger than the sum of its proper divisors (3857031).

11571081 is an equidigital number, since it uses as much as digits as its factorization.

11571081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3857030.

The product of its (nonzero) digits is 280, while the sum is 24.

The square root of 11571081 is about 3401.6291685015. The cubic root of 11571081 is about 226.1819676814.

Adding to 11571081 its reverse (18017511), we get a palindrome (29588592).

The spelling of 11571081 in words is "eleven million, five hundred seventy-one thousand, eighty-one".