8185145 has 4 divisors (see below), whose sum is σ = 9822180. Its totient is φ = 6548112.

The previous prime is 8185139. The next prime is 8185157. The reversal of 8185145 is 5415818.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5415818 = 2 ⋅2707909.

It can be written as a sum of positive squares in 2 ways, for example, as 4959529 + 3225616 = 2227^2 + 1796^2 .

It is a cyclic number.

It is not a de Polignac number, because 8185145 - 2⁶ = 8185081 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 818510 + ... + 818519.

It is an arithmetic number, because the mean of its divisors is an integer number (2455545).

Almost surely, 2^8185145 is an apocalyptic number.

It is an amenable number.

8185145 is a deficient number, since it is larger than the sum of its proper divisors (1637035).

8185145 is a wasteful number, since it uses less digits than its factorization.

8185145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637034.

The product of its digits is 6400, while the sum is 32.

The square root of 8185145 is about 2860.9692413586. The cubic root of 8185145 is about 201.5311233935.

The spelling of 8185145 in words is "eight million, one hundred eighty-five thousand, one hundred forty-five".