11495581 has 2 divisors, whose sum is σ = 11495582. Its totient is φ = 11495580.

The previous prime is 11495579. The next prime is 11495591. The reversal of 11495581 is 18559411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11492100 + 3481 = 3390^2 + 59^2 .

It is a cyclic number.

It is not a de Polignac number, because 11495581 - 2¹ = 11495579 is a prime.

It is a super-2 number, since 2×11495581² = 264296765055122, which contains 22 as substring.

Together with 11495579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11495531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5747790 + 5747791.

It is an arithmetic number, because the mean of its divisors is an integer number (5747791).

Almost surely, 2^11495581 is an apocalyptic number.

It is an amenable number.

11495581 is a deficient number, since it is larger than the sum of its proper divisors (1).

11495581 is an equidigital number, since it uses as much as digits as its factorization.

11495581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 34.

The square root of 11495581 is about 3390.5133829554. The cubic root of 11495581 is about 225.6889565545.

The spelling of 11495581 in words is "eleven million, four hundred ninety-five thousand, five hundred eighty-one".