8142139 has 8 divisors (see below), whose sum is σ = 8368128. Its totient is φ = 7918440.

The previous prime is 8142137. The next prime is 8142151. The reversal of 8142139 is 9312418.

It is a happy number.

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 8142139 - 2¹ = 8142137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8142131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8524 + ... + 9430.

It is an arithmetic number, because the mean of its divisors is an integer number (1046016).

Almost surely, 2^8142139 is an apocalyptic number.

8142139 is a deficient number, since it is larger than the sum of its proper divisors (225989).

8142139 is a wasteful number, since it uses less digits than its factorization.

8142139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145.

The product of its digits is 1728, while the sum is 28.

The square root of 8142139 is about 2853.4433584706. The cubic root of 8142139 is about 201.1775449989.

It can be divided in two parts, 8142 and 139, that added together give a square (8281 = 91²).

The spelling of 8142139 in words is "eight million, one hundred forty-two thousand, one hundred thirty-nine".