10491 has 8 divisors (see below), whose sum is σ = 15120.
Its totient is φ = 6432.
The previous prime is 10487. The next prime is 10499. The reversal of 10491 is 19401.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 10491 - 22 = 10487 is a prime.
It is a super-2 number, since 2×104912 = 220122162, which contains 22 as substring.
It is a self number, because there is not a number n which added to its sum of digits gives 10491.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (10499) 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, 96 + ... + 173.
It is an arithmetic number, because the mean of its divisors is an integer number (1890).
210491 is an apocalyptic number.
10491 is a deficient number, since it is larger than the sum of its proper divisors (4629).
10491 is a wasteful number, since it uses less digits than its factorization.
10491 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 285.
The product of its (nonzero) digits is 36, while the sum is 15.
The square root of 10491 is about 102.4255827418.
The cubic root of 10491 is about 21.8913374551.
Adding to 10491 its reverse (19401), we get a palindrome (29892).
The spelling of 10491 in words is "ten thousand, four hundred ninety-one".