9007561 has 4 divisors (see below), whose sum is σ = 9065092. Its totient is φ = 8950032.

The previous prime is 9007553. The next prime is 9007567. The reversal of 9007561 is 1657009.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1657009 = 19 ⋅87211.

It can be written as a sum of positive squares in 2 ways, for example, as 6031936 + 2975625 = 2456^2 + 1725^2 .

It is a cyclic number.

It is not a de Polignac number, because 9007561 - 2³ = 9007553 is a prime.

It is a super-2 number, since 2×9007561² = 162272310337442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9007567) 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, 28530 + ... + 28843.

It is an arithmetic number, because the mean of its divisors is an integer number (2266273).

Almost surely, 2^9007561 is an apocalyptic number.

It is an amenable number.

9007561 is a deficient number, since it is larger than the sum of its proper divisors (57531).

9007561 is a wasteful number, since it uses less digits than its factorization.

9007561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57530.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 9007561 is about 3001.2599021078. The cubic root of 9007561 is about 208.0666160517.

The spelling of 9007561 in words is "nine million, seven thousand, five hundred sixty-one".