9071561 has 4 divisors (see below), whose sum is σ = 9364224. Its totient is φ = 8778900.

The previous prime is 9071551. The next prime is 9071563. The reversal of 9071561 is 1651709.

It is a happy number.

9071561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1651709 = 617 ⋅2677.

It is a cyclic number.

It is not a de Polignac number, because 9071561 - 2⁶ = 9071497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9071563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146285 + ... + 146346.

It is an arithmetic number, because the mean of its divisors is an integer number (2341056).

Almost surely, 2^9071561 is an apocalyptic number.

It is an amenable number.

9071561 is a deficient number, since it is larger than the sum of its proper divisors (292663).

9071561 is a wasteful number, since it uses less digits than its factorization.

9071561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292662.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 9071561 is about 3011.9032188966. The cubic root of 9071561 is about 208.5582344950.

The spelling of 9071561 in words is "nine million, seventy-one thousand, five hundred sixty-one".