8280121 has 4 divisors (see below), whose sum is σ = 8315892. Its totient is φ = 8244352.

The previous prime is 8280053. The next prime is 8280127. The reversal of 8280121 is 1210828.

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 4260096 + 4020025 = 2064^2 + 2005^2 .

It is a cyclic number.

It is not a de Polignac number, because 8280121 - 2¹¹ = 8278073 is a prime.

It is a Duffinian number.

8280121 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 8280092 and 8280101.

It is not an unprimeable number, because it can be changed into a prime (8280127) 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, 17536 + ... + 18001.

It is an arithmetic number, because the mean of its divisors is an integer number (2078973).

Almost surely, 2^8280121 is an apocalyptic number.

It is an amenable number.

8280121 is a deficient number, since it is larger than the sum of its proper divisors (35771).

8280121 is a wasteful number, since it uses less digits than its factorization.

8280121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35770.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 8280121 is about 2877.5199391142. The cubic root of 8280121 is about 202.3076138562.

Adding to 8280121 its reverse (1210828), we get a palindrome (9490949).

The spelling of 8280121 in words is "eight million, two hundred eighty thousand, one hundred twenty-one".