13645671 has 16 divisors (see below), whose sum is σ = 19866336. Its totient is φ = 8280576.

The previous prime is 13645633. The next prime is 13645691. The reversal of 13645671 is 17654631.

It is not a de Polignac number, because 13645671 - 2⁶ = 13645607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13645691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 451 + ... + 5243.

It is an arithmetic number, because the mean of its divisors is an integer number (1241646).

Almost surely, 2^13645671 is an apocalyptic number.

13645671 is a deficient number, since it is larger than the sum of its proper divisors (6220665).

13645671 is a wasteful number, since it uses less digits than its factorization.

13645671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4882.

The product of its digits is 15120, while the sum is 33.

The square root of 13645671 is about 3694.0047374090. The cubic root of 13645671 is about 238.9635338235.

The spelling of 13645671 in words is "thirteen million, six hundred forty-five thousand, six hundred seventy-one".