8732281 has 4 divisors (see below), whose sum is σ = 8748964. Its totient is φ = 8715600.

The previous prime is 8732261. The next prime is 8732291. The reversal of 8732281 is 1822378.

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 3515625 + 5216656 = 1875^2 + 2284^2 .

It is a cyclic number.

It is not a de Polignac number, because 8732281 - 2¹⁵ = 8699513 is a prime.

It is a super-2 number, since 2×8732281² = 152505462925922, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (8732201) 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 3 ways as a sum of consecutive naturals, for example, 7530 + ... + 8611.

It is an arithmetic number, because the mean of its divisors is an integer number (2187241).

Almost surely, 2^8732281 is an apocalyptic number.

It is an amenable number.

8732281 is a deficient number, since it is larger than the sum of its proper divisors (16683).

8732281 is a wasteful number, since it uses less digits than its factorization.

8732281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16682.

The product of its digits is 5376, while the sum is 31.

The square root of 8732281 is about 2955.0433160954. The cubic root of 8732281 is about 205.9250756526.

Subtracting from 8732281 its reverse (1822378), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 8732281 in words is "eight million, seven hundred thirty-two thousand, two hundred eighty-one".