8147745 has 12 divisors (see below), whose sum is σ = 14122836. Its totient is φ = 4345440.

The previous prime is 8147717. The next prime is 8147759. The reversal of 8147745 is 5477418.

It can be written as a sum of positive squares in 2 ways, for example, as 4875264 + 3272481 = 2208^2 + 1809^2 .

It is not a de Polignac number, because 8147745 - 2⁷ = 8147617 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 90486 + ... + 90575.

It is an arithmetic number, because the mean of its divisors is an integer number (1176903).

Almost surely, 2^8147745 is an apocalyptic number.

It is an amenable number.

8147745 is a deficient number, since it is larger than the sum of its proper divisors (5975091).

8147745 is a wasteful number, since it uses less digits than its factorization.

8147745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181072 (or 181069 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 8147745 is about 2854.4255113770. The cubic root of 8147745 is about 201.2237057837.

The spelling of 8147745 in words is "eight million, one hundred forty-seven thousand, seven hundred forty-five".