8145505 has 4 divisors (see below), whose sum is σ = 9774612. Its totient is φ = 6516400.

The previous prime is 8145479. The next prime is 8145541. The reversal of 8145505 is 5055418.

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 4397409 + 3748096 = 2097^2 + 1936^2 .

It is not a de Polignac number, because 8145505 - 2¹⁵ = 8112737 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 814546 + ... + 814555.

It is an arithmetic number, because the mean of its divisors is an integer number (2443653).

Almost surely, 2^8145505 is an apocalyptic number.

It is an amenable number.

8145505 is a deficient number, since it is larger than the sum of its proper divisors (1629107).

8145505 is a wasteful number, since it uses less digits than its factorization.

8145505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629106.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 8145505 is about 2854.0331112305. The cubic root of 8145505 is about 201.2052637725.

The spelling of 8145505 in words is "eight million, one hundred forty-five thousand, five hundred five".