13491165 has 16 divisors (see below), whose sum is σ = 21643776. Its totient is φ = 7176000.

The previous prime is 13491161. The next prime is 13491211. The reversal of 13491165 is 56119431.

It is not a de Polignac number, because 13491165 - 2² = 13491161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13491161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5940 + ... + 7890.

It is an arithmetic number, because the mean of its divisors is an integer number (1352736).

Almost surely, 2^13491165 is an apocalyptic number.

13491165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13491165 is a deficient number, since it is larger than the sum of its proper divisors (8152611).

13491165 is a wasteful number, since it uses less digits than its factorization.

13491165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2420.

The product of its digits is 3240, while the sum is 30.

The square root of 13491165 is about 3673.0321261868. The cubic root of 13491165 is about 238.0582031698.

The spelling of 13491165 in words is "thirteen million, four hundred ninety-one thousand, one hundred sixty-five".