8725289 has 4 divisors (see below), whose sum is σ = 8811780. Its totient is φ = 8638800.

The previous prime is 8725279. The next prime is 8725307. The reversal of 8725289 is 9825278.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4481689 + 4243600 = 2117^2 + 2060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8725289 is a prime.

It is a super-2 number, since 2×8725289² = 152261336267042, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8725219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43094 + ... + 43295.

It is an arithmetic number, because the mean of its divisors is an integer number (2202945).

Almost surely, 2^8725289 is an apocalyptic number.

It is an amenable number.

8725289 is a deficient number, since it is larger than the sum of its proper divisors (86491).

8725289 is a wasteful number, since it uses less digits than its factorization.

8725289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86490.

The product of its digits is 80640, while the sum is 41.

The square root of 8725289 is about 2953.8600169947. The cubic root of 8725289 is about 205.8700990818.

The spelling of 8725289 in words is "eight million, seven hundred twenty-five thousand, two hundred eighty-nine".