8206642 has 12 divisors (see below), whose sum is σ = 12622698. Its totient is φ = 4001600.

The previous prime is 8206633. The next prime is 8206643. The reversal of 8206642 is 2466028.

It can be written as a sum of positive squares in 3 ways, for example, as 1125721 + 7080921 = 1061^2 + 2661^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8206642.

It is not an unprimeable number, because it can be changed into a prime (8206643) 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 5 ways as a sum of consecutive naturals, for example, 2142 + ... + 4582.

Almost surely, 2^8206642 is an apocalyptic number.

8206642 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

8206642 is a deficient number, since it is larger than the sum of its proper divisors (4416056).

8206642 is a wasteful number, since it uses less digits than its factorization.

8206642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2525 (or 2484 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 8206642 is about 2864.7237214084. The cubic root of 8206642 is about 201.7073991292.

The spelling of 8206642 in words is "eight million, two hundred six thousand, six hundred forty-two".