139415 has 4 divisors (see below), whose sum is σ = 167304. Its totient is φ = 111528.

The previous prime is 139409. The next prime is 139423. The reversal of 139415 is 514931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 514931 = 409 ⋅1259.

It is a cyclic number.

It is not a de Polignac number, because 139415 - 2¹² = 135319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13937 + ... + 13946.

It is an arithmetic number, because the mean of its divisors is an integer number (41826).

2¹³⁹⁴¹⁵ is an apocalyptic number.

139415 is a deficient number, since it is larger than the sum of its proper divisors (27889).

139415 is an equidigital number, since it uses as much as digits as its factorization.

139415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27888.

The product of its digits is 540, while the sum is 23.

The square root of 139415 is about 373.3831811959. The cubic root of 139415 is about 51.8525160220.

It can be divided in two parts, 1394 and 15, that multiplied together give a triangular number (20910 = T₂₀₄).

The spelling of 139415 in words is "one hundred thirty-nine thousand, four hundred fifteen".