13855145 has 8 divisors (see below), whose sum is σ = 16646280. Its totient is φ = 11070720.

The previous prime is 13855141. The next prime is 13855151. The reversal of 13855145 is 54155831.

It can be written as a sum of positive squares in 4 ways, for example, as 583696 + 13271449 = 764^2 + 3643^2 .

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

It is not a de Polignac number, because 13855145 - 2² = 13855141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13855141) 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 7 ways as a sum of consecutive naturals, for example, 6515 + ... + 8375.

It is an arithmetic number, because the mean of its divisors is an integer number (2080785).

Almost surely, 2^13855145 is an apocalyptic number.

It is an amenable number.

13855145 is a deficient number, since it is larger than the sum of its proper divisors (2791135).

13855145 is a wasteful number, since it uses less digits than its factorization.

13855145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3355.

The product of its digits is 12000, while the sum is 32.

The square root of 13855145 is about 3722.2499916045. The cubic root of 13855145 is about 240.1801020815.

The spelling of 13855145 in words is "thirteen million, eight hundred fifty-five thousand, one hundred forty-five".