13408641 has 12 divisors (see below), whose sum is σ = 19424080. Its totient is φ = 8913240.

The previous prime is 13408639. The next prime is 13408669. The reversal of 13408641 is 14680431.

13408641 is a `hidden beast` number, since 13 + 4 + 0 + 8 + 641 = 666.

It is not a de Polignac number, because 13408641 - 2¹ = 13408639 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (13408621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1446 + ... + 5376.

Almost surely, 2^13408641 is an apocalyptic number.

It is an amenable number.

13408641 is a deficient number, since it is larger than the sum of its proper divisors (6015439).

13408641 is a wasteful number, since it uses less digits than its factorization.

13408641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4316 (or 4313 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 13408641 is about 3661.7811239887. The cubic root of 13408641 is about 237.5718179852.

The spelling of 13408641 in words is "thirteen million, four hundred eight thousand, six hundred forty-one".