139515 has 16 divisors (see below), whose sum is σ = 228096. Its totient is φ = 72800.

The previous prime is 139511. The next prime is 139537. The reversal of 139515 is 515931.

139515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139515 - 2² = 139511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139511) 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, 1000 + ... + 1130.

It is an arithmetic number, because the mean of its divisors is an integer number (14256).

2¹³⁹⁵¹⁵ is an apocalyptic number.

139515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

139515 is a deficient number, since it is larger than the sum of its proper divisors (88581).

139515 is a wasteful number, since it uses less digits than its factorization.

139515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210.

The product of its digits is 675, while the sum is 24.

The square root of 139515 is about 373.5170678831. The cubic root of 139515 is about 51.8649107005.

The spelling of 139515 in words is "one hundred thirty-nine thousand, five hundred fifteen".