9013581 has 12 divisors (see below), whose sum is σ = 13705120. Its totient is φ = 5692680.

The previous prime is 9013561. The next prime is 9013597. The reversal of 9013581 is 1853109.

It is not a de Polignac number, because 9013581 - 2⁷ = 9013453 is a prime.

It is a super-2 number, since 2×9013581² = 162489284887122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9013541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26185 + ... + 26526.

Almost surely, 2^9013581 is an apocalyptic number.

It is an amenable number.

9013581 is a deficient number, since it is larger than the sum of its proper divisors (4691539).

9013581 is a wasteful number, since it uses less digits than its factorization.

9013581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52736 (or 52733 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 9013581 is about 3002.2626467383. The cubic root of 9013581 is about 208.1129579376.

The spelling of 9013581 in words is "nine million, thirteen thousand, five hundred eighty-one".