9141581 has 2 divisors, whose sum is σ = 9141582. Its totient is φ = 9141580.

The previous prime is 9141577. The next prime is 9141589. The reversal of 9141581 is 1851419.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9030025 + 111556 = 3005^2 + 334^2 .

It is a cyclic number.

It is not a de Polignac number, because 9141581 - 2² = 9141577 is a prime.

It is a super-2 number, since 2×9141581² = 167137006359122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9141589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4570790 + 4570791.

It is an arithmetic number, because the mean of its divisors is an integer number (4570791).

Almost surely, 2^9141581 is an apocalyptic number.

It is an amenable number.

9141581 is a deficient number, since it is larger than the sum of its proper divisors (1).

9141581 is an equidigital number, since it uses as much as digits as its factorization.

9141581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 29.

The square root of 9141581 is about 3023.5047544199. The cubic root of 9141581 is about 209.0934542338.

The spelling of 9141581 in words is "nine million, one hundred forty-one thousand, five hundred eighty-one".