8139841 has 4 divisors (see below), whose sum is σ = 8147392. Its totient is φ = 8132292.

The previous prime is 8139829. The next prime is 8139869. The reversal of 8139841 is 1489318.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1489318 = 2 ⋅744659.

It is a cyclic number.

It is not a de Polignac number, because 8139841 - 2¹⁷ = 8008769 is a prime.

It is a Duffinian number.

8139841 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 8139797 and 8139806.

It is not an unprimeable number, because it can be changed into a prime (8139871) 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, 1821 + ... + 4426.

It is an arithmetic number, because the mean of its divisors is an integer number (2036848).

Almost surely, 2^8139841 is an apocalyptic number.

It is an amenable number.

8139841 is a deficient number, since it is larger than the sum of its proper divisors (7551).

8139841 is a wasteful number, since it uses less digits than its factorization.

8139841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7550.

The product of its digits is 6912, while the sum is 34.

The square root of 8139841 is about 2853.0406586658. The cubic root of 8139841 is about 201.1586167419.

The spelling of 8139841 in words is "eight million, one hundred thirty-nine thousand, eight hundred forty-one".