13405445 has 8 divisors (see below), whose sum is σ = 16189944. Its totient is φ = 10655424.

The previous prime is 13405429. The next prime is 13405451. The reversal of 13405445 is 54450431.

It can be written as a sum of positive squares in 4 ways, for example, as 438244 + 12967201 = 662^2 + 3601^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13405445 - 2⁴ = 13405429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7754 + ... + 9323.

It is an arithmetic number, because the mean of its divisors is an integer number (2023743).

Almost surely, 2^13405445 is an apocalyptic number.

It is an amenable number.

13405445 is a deficient number, since it is larger than the sum of its proper divisors (2784499).

13405445 is a wasteful number, since it uses less digits than its factorization.

13405445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17239.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 13405445 is about 3661.3446983315. The cubic root of 13405445 is about 237.5529411066.

Adding to 13405445 its reverse (54450431), we get a palindrome (67855876).

The spelling of 13405445 in words is "thirteen million, four hundred five thousand, four hundred forty-five".