8439145 has 48 divisors (see below), whose sum is σ = 12736080. Its totient is φ = 5322240.

The previous prime is 8439143. The next prime is 8439149. The reversal of 8439145 is 5419348.

It can be written as a sum of positive squares in 8 ways, for example, as 5929 + 8433216 = 77^2 + 2904^2 .

It is not a de Polignac number, because 8439145 - 2¹ = 8439143 is a prime.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 8439145.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8439143) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 228067 + ... + 228103.

It is an arithmetic number, because the mean of its divisors is an integer number (265335).

Almost surely, 2^8439145 is an apocalyptic number.

It is an amenable number.

8439145 is a deficient number, since it is larger than the sum of its proper divisors (4296935).

8439145 is a wasteful number, since it uses less digits than its factorization.

8439145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106 (or 95 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 8439145 is about 2905.0206539713. The cubic root of 8439145 is about 203.5945506574.

The spelling of 8439145 in words is "eight million, four hundred thirty-nine thousand, one hundred forty-five".