8643261 has 8 divisors (see below), whose sum is σ = 12572064. Its totient is φ = 5238320.

The previous prime is 8643223. The next prime is 8643281. The reversal of 8643261 is 1623468.

8643261 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8643261 - 2⁶ = 8643197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8643211) 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 7 ways as a sum of consecutive naturals, for example, 130926 + ... + 130991.

It is an arithmetic number, because the mean of its divisors is an integer number (1571508).

Almost surely, 2^8643261 is an apocalyptic number.

It is an amenable number.

8643261 is a deficient number, since it is larger than the sum of its proper divisors (3928803).

8643261 is a wasteful number, since it uses less digits than its factorization.

8643261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261931.

The product of its digits is 6912, while the sum is 30.

The square root of 8643261 is about 2939.9423463735. The cubic root of 8643261 is about 205.2229262408. Note that the first 3 decimals are identical.

The spelling of 8643261 in words is "eight million, six hundred forty-three thousand, two hundred sixty-one".