7805145 has 16 divisors (see below), whose sum is σ = 12779712. Its totient is φ = 4065600.

The previous prime is 7805141. The next prime is 7805153. The reversal of 7805145 is 5415087.

It is not a de Polignac number, because 7805145 - 2² = 7805141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7805141) 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 15 ways as a sum of consecutive naturals, for example, 5406 + ... + 6695.

It is an arithmetic number, because the mean of its divisors is an integer number (798732).

Almost surely, 2^7805145 is an apocalyptic number.

It is an amenable number.

7805145 is a deficient number, since it is larger than the sum of its proper divisors (4974567).

7805145 is a wasteful number, since it uses less digits than its factorization.

7805145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12152.

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 7805145 is about 2793.7689596672. The cubic root of 7805145 is about 198.3628434932.

The spelling of 7805145 in words is "seven million, eight hundred five thousand, one hundred forty-five".