9162581 has 2 divisors, whose sum is σ = 9162582. Its totient is φ = 9162580.

The previous prime is 9162563. The next prime is 9162583. The reversal of 9162581 is 1852619.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5958481 + 3204100 = 2441^2 + 1790^2 .

It is a cyclic number.

It is not a de Polignac number, because 9162581 - 2¹⁰ = 9161557 is a prime.

It is a super-2 number, since 2×9162581² = 167905781163122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 9162583, it forms a pair of twin primes.

It is a Chen 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 (9162583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4581290 + 4581291.

It is an arithmetic number, because the mean of its divisors is an integer number (4581291).

Almost surely, 2^9162581 is an apocalyptic number.

It is an amenable number.

9162581 is a deficient number, since it is larger than the sum of its proper divisors (1).

9162581 is an equidigital number, since it uses as much as digits as its factorization.

9162581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 32.

The square root of 9162581 is about 3026.9755532544. The cubic root of 9162581 is about 209.2534413127.

The spelling of 9162581 in words is "nine million, one hundred sixty-two thousand, five hundred eighty-one".