8459861 has 4 divisors (see below), whose sum is σ = 8543724. Its totient is φ = 8376000.

The previous prime is 8459839. The next prime is 8459879. The reversal of 8459861 is 1689548.

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 5880625 + 2579236 = 2425^2 + 1606^2 .

It is a cyclic number.

It is not a de Polignac number, because 8459861 - 2⁶ = 8459797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8459821) 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, 41780 + ... + 41981.

It is an arithmetic number, because the mean of its divisors is an integer number (2135931).

Almost surely, 2^8459861 is an apocalyptic number.

It is an amenable number.

8459861 is a deficient number, since it is larger than the sum of its proper divisors (83863).

8459861 is a wasteful number, since it uses less digits than its factorization.

8459861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83862.

The product of its digits is 69120, while the sum is 41.

The square root of 8459861 is about 2908.5840197594. The cubic root of 8459861 is about 203.7610058416.

The spelling of 8459861 in words is "eight million, four hundred fifty-nine thousand, eight hundred sixty-one".