13530491 has 4 divisors (see below), whose sum is σ = 14571312. Its totient is φ = 12489672.

The previous prime is 13530479. The next prime is 13530499. The reversal of 13530491 is 19403531.

13530491 is digitally balanced in base 3, 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 an emirpimes, since its reverse is a distinct semiprime: 19403531 = 7 ⋅2771933.

It is not a de Polignac number, because 13530491 - 2¹⁴ = 13514107 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 13530491.

It is not an unprimeable number, because it can be changed into a prime (13530499) 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, 520391 + ... + 520416.

It is an arithmetic number, because the mean of its divisors is an integer number (3642828).

Almost surely, 2^13530491 is an apocalyptic number.

13530491 is a deficient number, since it is larger than the sum of its proper divisors (1040821).

13530491 is a wasteful number, since it uses less digits than its factorization.

13530491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040820.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 13530491 is about 3678.3815734641. The cubic root of 13530491 is about 238.2892876153.

The spelling of 13530491 in words is "thirteen million, five hundred thirty thousand, four hundred ninety-one".