13506145 has 8 divisors (see below), whose sum is σ = 16326504. Its totient is φ = 10725504.

The previous prime is 13506139. The next prime is 13506151. The reversal of 13506145 is 54160531.

It is an interprime number because it is at equal distance from previous prime (13506139) and next prime (13506151).

It can be written as a sum of positive squares in 4 ways, for example, as 132496 + 13373649 = 364^2 + 3657^2 .

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 13506145 - 2⁵ = 13506113 is a prime.

It is a super-2 number, since 2×13506145² = 364831905522050, which contains 22 as substring.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 9174 + ... + 10543.

It is an arithmetic number, because the mean of its divisors is an integer number (2040813).

Almost surely, 2^13506145 is an apocalyptic number.

It is an amenable number.

13506145 is a deficient number, since it is larger than the sum of its proper divisors (2820359).

13506145 is a wasteful number, since it uses less digits than its factorization.

13506145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19859.

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

The square root of 13506145 is about 3675.0707476183. The cubic root of 13506145 is about 238.1462803871.

Adding to 13506145 its reverse (54160531), we get a palindrome (67666676).

The spelling of 13506145 in words is "thirteen million, five hundred six thousand, one hundred forty-five".