7985139 has 8 divisors (see below), whose sum is σ = 10847952. Its totient is φ = 5222880.

The previous prime is 7985123. The next prime is 7985141. The reversal of 7985139 is 9315897.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7985139 - 2⁴ = 7985123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7985139.

It is not an unprimeable number, because it can be changed into a prime (7985039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24952 + ... + 25269.

It is an arithmetic number, because the mean of its divisors is an integer number (1355994).

Almost surely, 2^7985139 is an apocalyptic number.

7985139 is a deficient number, since it is larger than the sum of its proper divisors (2862813).

7985139 is a wasteful number, since it uses less digits than its factorization.

7985139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50277.

The product of its digits is 68040, while the sum is 42.

The square root of 7985139 is about 2825.7988251112. The cubic root of 7985139 is about 199.8760815703.

The spelling of 7985139 in words is "seven million, nine hundred eighty-five thousand, one hundred thirty-nine".