129315 has 16 divisors (see below), whose sum is σ = 213408. Its totient is φ = 66816.

The previous prime is 129313. The next prime is 129341. The reversal of 129315 is 513921.

129315 = T₁₆₅ + T₁₆₆ + ... + T₁₇₃.

It is not a de Polignac number, because 129315 - 2¹ = 129313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129291 and 129300.

It is not an unprimeable number, because it can be changed into a prime (129313) 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, 439 + ... + 671.

It is an arithmetic number, because the mean of its divisors is an integer number (13338).

2¹²⁹³¹⁵ is an apocalyptic number.

129315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129315 is a deficient number, since it is larger than the sum of its proper divisors (84093).

129315 is a wasteful number, since it uses less digits than its factorization.

129315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278.

The product of its digits is 270, while the sum is 21.

The square root of 129315 is about 359.6039488104. The cubic root of 129315 is about 50.5688372748.

Multiplying 129315 by its sum of digits (21), we get a triangular number (2715615 = T₂₃₃₀).

It can be divided in two parts, 129 and 315, that added together give a palindrome (444).

The spelling of 129315 in words is "one hundred twenty-nine thousand, three hundred fifteen".