8247861 has 12 divisors (see below), whose sum is σ = 12324780. Its totient is φ = 5308800.

The previous prime is 8247859. The next prime is 8247887. The reversal of 8247861 is 1687428.

It can be written as a sum of positive squares in 2 ways, for example, as 6200100 + 2047761 = 2490^2 + 1431^2 .

It is not a de Polignac number, because 8247861 - 2¹ = 8247859 is a prime.

It is a super-2 number, since 2×8247861² = 136054422150642, which contains 22 as substring.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8247821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15540 + ... + 16061.

It is an arithmetic number, because the mean of its divisors is an integer number (1027065).

Almost surely, 2^8247861 is an apocalyptic number.

It is an amenable number.

8247861 is a deficient number, since it is larger than the sum of its proper divisors (4076919).

8247861 is a wasteful number, since it uses less digits than its factorization.

8247861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31636 (or 31633 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 8247861 is about 2871.9089470246. The cubic root of 8247861 is about 202.0445364663.

The spelling of 8247861 in words is "eight million, two hundred forty-seven thousand, eight hundred sixty-one".