139115 has 4 divisors (see below), whose sum is σ = 166944. Its totient is φ = 111288.

The previous prime is 139109. The next prime is 139121. The reversal of 139115 is 511931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 511931 = 7 ⋅73133.

It is an interprime number because it is at equal distance from previous prime (139109) and next prime (139121).

It is a cyclic number.

It is not a de Polignac number, because 139115 - 2¹² = 135019 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

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 3 ways as a sum of consecutive naturals, for example, 13907 + ... + 13916.

It is an arithmetic number, because the mean of its divisors is an integer number (41736).

2¹³⁹¹¹⁵ is an apocalyptic number.

139115 is a deficient number, since it is larger than the sum of its proper divisors (27829).

139115 is an equidigital number, since it uses as much as digits as its factorization.

139115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27828.

The product of its digits is 135, while the sum is 20.

The square root of 139115 is about 372.9812327718. The cubic root of 139115 is about 51.8152963875.

Subtracting 139115 from its reverse (511931), we obtain a triangular number (372816 = T₈₆₃).

The spelling of 139115 in words is "one hundred thirty-nine thousand, one hundred fifteen".