13451605 has 4 divisors (see below), whose sum is σ = 16141932. Its totient is φ = 10761280.

The previous prime is 13451513. The next prime is 13451617. The reversal of 13451605 is 50615431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8059921 + 5391684 = 2839^2 + 2322^2 .

It is not a de Polignac number, because 13451605 - 2¹⁷ = 13320533 is a prime.

It is a Duffinian number.

It is a plaindrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 13451605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1345156 + ... + 1345165.

It is an arithmetic number, because the mean of its divisors is an integer number (4035483).

Almost surely, 2^13451605 is an apocalyptic number.

It is an amenable number.

13451605 is a deficient number, since it is larger than the sum of its proper divisors (2690327).

13451605 is an equidigital number, since it uses as much as digits as its factorization.

13451605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2690326.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 13451605 is about 3667.6429760815. The cubic root of 13451605 is about 237.8252901840.

The spelling of 13451605 in words is "thirteen million, four hundred fifty-one thousand, six hundred five".