8247642 has 32 divisors (see below), whose sum is σ = 18204480. Its totient is φ = 2474880.

The previous prime is 8247641. The next prime is 8247647. The reversal of 8247642 is 2467428.

It is not an unprimeable number, because it can be changed into a prime (8247641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1909 + ... + 4487.

It is an arithmetic number, because the mean of its divisors is an integer number (568890).

Almost surely, 2^8247642 is an apocalyptic number.

8247642 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 8247642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9102240).

8247642 is an abundant number, since it is smaller than the sum of its proper divisors (9956838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8247642 is a wasteful number, since it uses less digits than its factorization.

8247642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2638.

The product of its digits is 21504, while the sum is 33.

The square root of 8247642 is about 2871.8708188218. The cubic root of 8247642 is about 202.0427481988.

The spelling of 8247642 in words is "eight million, two hundred forty-seven thousand, six hundred forty-two".