13490561 has 4 divisors (see below), whose sum is σ = 15417792. Its totient is φ = 11563332.

The previous prime is 13490509. The next prime is 13490573. The reversal of 13490561 is 16509431.

13490561 is digitally balanced in base 2, 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16509431 = 17 ⋅971143.

It is a cyclic number.

It is not a de Polignac number, because 13490561 - 2¹⁰ = 13489537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13490591) 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, 963605 + ... + 963618.

It is an arithmetic number, because the mean of its divisors is an integer number (3854448).

Almost surely, 2^13490561 is an apocalyptic number.

It is an amenable number.

13490561 is a deficient number, since it is larger than the sum of its proper divisors (1927231).

13490561 is an equidigital number, since it uses as much as digits as its factorization.

13490561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927230.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 13490561 is about 3672.9499043684. The cubic root of 13490561 is about 238.0546504917.

Adding to 13490561 its reverse (16509431), we get a palindrome (29999992).

The spelling of 13490561 in words is "thirteen million, four hundred ninety thousand, five hundred sixty-one".