9081561 has 4 divisors (see below), whose sum is σ = 12108752. Its totient is φ = 6054372.

The previous prime is 9081559. The next prime is 9081577. The reversal of 9081561 is 1651809.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9081561 - 2¹ = 9081559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9081161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1513591 + ... + 1513596.

It is an arithmetic number, because the mean of its divisors is an integer number (3027188).

Almost surely, 2^9081561 is an apocalyptic number.

It is an amenable number.

9081561 is a deficient number, since it is larger than the sum of its proper divisors (3027191).

9081561 is a wasteful number, since it uses less digits than its factorization.

9081561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3027190.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 9081561 is about 3013.5628415548. The cubic root of 9081561 is about 208.6348408060.

The spelling of 9081561 in words is "nine million, eighty-one thousand, five hundred sixty-one".