8242649 has 4 divisors (see below), whose sum is σ = 8355636. Its totient is φ = 8129664.

The previous prime is 8242639. The next prime is 8242667. The reversal of 8242649 is 9462428.

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 5784025 + 2458624 = 2405^2 + 1568^2 .

It is a cyclic number.

It is not a de Polignac number, because 8242649 - 2¹² = 8238553 is a prime.

It is a d-powerful number, because it can be written as 8³ + 2¹³ + 4⁹ + 2²¹ + 6⁸ + 4¹¹ + 9³ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8242609) 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, 56384 + ... + 56529.

It is an arithmetic number, because the mean of its divisors is an integer number (2088909).

Almost surely, 2^8242649 is an apocalyptic number.

It is an amenable number.

8242649 is a deficient number, since it is larger than the sum of its proper divisors (112987).

8242649 is a wasteful number, since it uses less digits than its factorization.

8242649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112986.

The product of its digits is 27648, while the sum is 35.

The square root of 8242649 is about 2871.0013932424. The cubic root of 8242649 is about 202.0019687420.

The spelling of 8242649 in words is "eight million, two hundred forty-two thousand, six hundred forty-nine".