13487645 has 4 divisors (see below), whose sum is σ = 16185180. Its totient is φ = 10790112.

The previous prime is 13487633. The next prime is 13487651. The reversal of 13487645 is 54678431.

13487645 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: 54678431 = 811 ⋅67421.

It can be written as a sum of positive squares in 2 ways, for example, as 1968409 + 11519236 = 1403^2 + 3394^2 .

It is a cyclic number.

It is not a de Polignac number, because 13487645 - 2⁸ = 13487389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13487599 and 13487608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1348760 + ... + 1348769.

It is an arithmetic number, because the mean of its divisors is an integer number (4046295).

Almost surely, 2^13487645 is an apocalyptic number.

It is an amenable number.

13487645 is a deficient number, since it is larger than the sum of its proper divisors (2697535).

13487645 is an equidigital number, since it uses as much as digits as its factorization.

13487645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697534.

The product of its digits is 80640, while the sum is 38.

The square root of 13487645 is about 3672.5529267800. The cubic root of 13487645 is about 238.0374973285.

The spelling of 13487645 in words is "thirteen million, four hundred eighty-seven thousand, six hundred forty-five".