8406139 has 16 divisors (see below), whose sum is σ = 9884160. Its totient is φ = 7001280.

The previous prime is 8406127. The next prime is 8406161. The reversal of 8406139 is 9316048.

It is a cyclic number.

It is not a de Polignac number, because 8406139 - 2⁹ = 8405627 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8406139.

It is not an unprimeable number, because it can be changed into a prime (8406439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64104 + ... + 64234.

It is an arithmetic number, because the mean of its divisors is an integer number (617760).

Almost surely, 2^8406139 is an apocalyptic number.

8406139 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

8406139 is the 1834-th heptagonal number.

8406139 is a deficient number, since it is larger than the sum of its proper divisors (1478021).

8406139 is a wasteful number, since it uses less digits than its factorization.

8406139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 8406139 is about 2899.3342339234. The cubic root of 8406139 is about 203.3287803931.

Subtracting 8406139 from its reverse (9316048), we obtain a palindrome (909909).

It can be divided in two parts, 84061 and 39, that added together give a square (84100 = 290²).

The spelling of 8406139 in words is "eight million, four hundred six thousand, one hundred thirty-nine".