8139845 has 8 divisors (see below), whose sum is σ = 11163264. Its totient is φ = 5581584.

The previous prime is 8139829. The next prime is 8139869. The reversal of 8139845 is 5489318.

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 8139845 - 2⁴ = 8139829 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8139799 and 8139808.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116249 + ... + 116318.

It is an arithmetic number, because the mean of its divisors is an integer number (1395408).

Almost surely, 2^8139845 is an apocalyptic number.

It is an amenable number.

8139845 is a deficient number, since it is larger than the sum of its proper divisors (3023419).

8139845 is a wasteful number, since it uses less digits than its factorization.

8139845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232579.

The product of its digits is 34560, while the sum is 38.

The square root of 8139845 is about 2853.0413596722. The cubic root of 8139845 is about 201.1586496924.

The spelling of 8139845 in words is "eight million, one hundred thirty-nine thousand, eight hundred forty-five".