13491385 has 4 divisors (see below), whose sum is σ = 16189668. Its totient is φ = 10793104.

The previous prime is 13491377. The next prime is 13491389. The reversal of 13491385 is 58319431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58319431 = 3623 ⋅16097.

It can be written as a sum of positive squares in 2 ways, for example, as 1401856 + 12089529 = 1184^2 + 3477^2 .

It is a cyclic number.

It is not a de Polignac number, because 13491385 - 2³ = 13491377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13491385.

It is not an unprimeable number, because it can be changed into a prime (13491389) 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, 1349134 + ... + 1349143.

It is an arithmetic number, because the mean of its divisors is an integer number (4047417).

Almost surely, 2^13491385 is an apocalyptic number.

It is an amenable number.

13491385 is a deficient number, since it is larger than the sum of its proper divisors (2698283).

13491385 is an equidigital number, since it uses as much as digits as its factorization.

13491385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2698282.

The product of its digits is 12960, while the sum is 34.

The square root of 13491385 is about 3673.0620740739. The cubic root of 13491385 is about 238.0594971653.

It can be divided in two parts, 134 and 91385, that added together give a palindrome (91519).

The spelling of 13491385 in words is "thirteen million, four hundred ninety-one thousand, three hundred eighty-five".