11501 has 8 divisors (see below), whose sum is σ = 13824. Its totient is φ = 9360.

The previous prime is 11497. The next prime is 11503. The reversal of 11501 is 10511.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11501 - 2² = 11497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191 + ... + 243.

It is an arithmetic number, because the mean of its divisors is an integer number (1728).

2¹¹⁵⁰¹ is an apocalyptic number.

It is an amenable number.

11501 is a deficient number, since it is larger than the sum of its proper divisors (2323).

11501 is an equidigital number, since it uses as much as digits as its factorization.

11501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91.

The product of its (nonzero) digits is 5, while the sum is 8.

The square root of 11501 is about 107.2427153703. The cubic root of 11501 is about 22.5724414131.

Subtracting from 11501 its reverse (10511), we obtain a triangular number (990 = T₄₄).

It can be divided in two parts, 11 and 501, that added together give a 9-th power (512 = 2⁹).

The spelling of 11501 in words is "eleven thousand, five hundred one".