11040581 has 4 divisors (see below), whose sum is σ = 11143872. Its totient is φ = 10937292.

The previous prime is 11040569. The next prime is 11040583. The reversal of 11040581 is 18504011.

11040581 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: 18504011 = 97 ⋅190763.

It is a cyclic number.

It is not a de Polignac number, because 11040581 - 2⁶ = 11040517 is a prime.

It is a super-2 number, since 2×11040581² = 243788857635122, 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 (11040583) 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, 51485 + ... + 51698.

It is an arithmetic number, because the mean of its divisors is an integer number (2785968).

Almost surely, 2^11040581 is an apocalyptic number.

It is an amenable number.

11040581 is a deficient number, since it is larger than the sum of its proper divisors (103291).

11040581 is a wasteful number, since it uses less digits than its factorization.

11040581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103290.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 11040581 is about 3322.7369742428. The cubic root of 11040581 is about 222.6711623249.

Adding to 11040581 its reverse (18504011), we get a palindrome (29544592).

The spelling of 11040581 in words is "eleven million, forty thousand, five hundred eighty-one".