9125581 has 2 divisors, whose sum is σ = 9125582. Its totient is φ = 9125580.

The previous prime is 9125573. The next prime is 9125609. The reversal of 9125581 is 1855219.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8649481 + 476100 = 2941^2 + 690^2 .

It is an emirp because it is prime and its reverse (1855219) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9125581 - 2³ = 9125573 is a prime.

It is a super-2 number, since 2×9125581² = 166552457175122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9125521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4562790 + 4562791.

It is an arithmetic number, because the mean of its divisors is an integer number (4562791).

Almost surely, 2^9125581 is an apocalyptic number.

It is an amenable number.

9125581 is a deficient number, since it is larger than the sum of its proper divisors (1).

9125581 is an equidigital number, since it uses as much as digits as its factorization.

9125581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 31.

The square root of 9125581 is about 3020.8576596722. The cubic root of 9125581 is about 208.9713947863.

The spelling of 9125581 in words is "nine million, one hundred twenty-five thousand, five hundred eighty-one".