8121249 has 8 divisors (see below), whose sum is σ = 12031520. Its totient is φ = 5414148.

The previous prime is 8121209. The next prime is 8121283. The reversal of 8121249 is 9421218.

It is not a de Polignac number, because 8121249 - 2⁹ = 8120737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 300787 = 8121249 / (8 + 1 + 2 + 1 + 2 + 4 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8121209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150367 + ... + 150420.

It is an arithmetic number, because the mean of its divisors is an integer number (1503940).

Almost surely, 2^8121249 is an apocalyptic number.

It is an amenable number.

8121249 is a deficient number, since it is larger than the sum of its proper divisors (3910271).

8121249 is a wasteful number, since it uses less digits than its factorization.

8121249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300796 (or 300790 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 8121249 is about 2849.7805178645. The cubic root of 8121249 is about 201.0053462601.

The spelling of 8121249 in words is "eight million, one hundred twenty-one thousand, two hundred forty-nine".