13785145 has 16 divisors (see below), whose sum is σ = 18133632. Its totient is φ = 9976960.

The previous prime is 13785133. The next prime is 13785169. The reversal of 13785145 is 54158731.

It is a happy number.

It is not a de Polignac number, because 13785145 - 2¹¹ = 13783097 is a prime.

It is a super-4 number, since 4×13785145⁴ (a number of 30 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13785145.

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 15 ways as a sum of consecutive naturals, for example, 13989 + ... + 14941.

It is an arithmetic number, because the mean of its divisors is an integer number (1133352).

Almost surely, 2^13785145 is an apocalyptic number.

It is an amenable number.

13785145 is a deficient number, since it is larger than the sum of its proper divisors (4348487).

13785145 is a wasteful number, since it uses less digits than its factorization.

13785145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232.

The product of its digits is 16800, while the sum is 34.

The square root of 13785145 is about 3712.8351700554. The cubic root of 13785145 is about 239.7749336800.

The spelling of 13785145 in words is "thirteen million, seven hundred eighty-five thousand, one hundred forty-five".