8239725 has 60 divisors (see below), whose sum is σ = 16489396. Its totient is φ = 4043520.

The previous prime is 8239723. The next prime is 8239733. The reversal of 8239725 is 5279328.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3337929 + 4901796 = 1827^2 + 2214^2 .

It is not a de Polignac number, because 8239725 - 2¹ = 8239723 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8239725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8239723) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 26169 + ... + 26481.

Almost surely, 2^8239725 is an apocalyptic number.

It is an amenable number.

8239725 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

8239725 is a wasteful number, since it uses less digits than its factorization.

8239725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348 (or 334 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 8239725 is about 2870.4921180871. The cubic root of 8239725 is about 201.9780798356.

The spelling of 8239725 in words is "eight million, two hundred thirty-nine thousand, seven hundred twenty-five".