11112581 has 2 divisors, whose sum is σ = 11112582. Its totient is φ = 11112580.

The previous prime is 11112559. The next prime is 11112583. The reversal of 11112581 is 18521111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9333025 + 1779556 = 3055^2 + 1334^2 .

It is a cyclic number.

It is not a de Polignac number, because 11112581 - 2²² = 6918277 is a prime.

It is a super-2 number, since 2×11112581² = 246978912963122, which contains 22 as substring.

Together with 11112583, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11112583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556290 + 5556291.

It is an arithmetic number, because the mean of its divisors is an integer number (5556291).

Almost surely, 2^11112581 is an apocalyptic number.

It is an amenable number.

11112581 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112581 is an equidigital number, since it uses as much as digits as its factorization.

11112581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80, while the sum is 20.

The square root of 11112581 is about 3333.5538093752. The cubic root of 11112581 is about 223.1541561807.

Adding to 11112581 its reverse (18521111), we get a palindrome (29633692).

The spelling of 11112581 in words is "eleven million, one hundred twelve thousand, five hundred eighty-one".