123415 has 4 divisors (see below), whose sum is σ = 148104. Its totient is φ = 98728.

The previous prime is 123407. The next prime is 123419. The reversal of 123415 is 514321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123415 - 2³ = 123407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12337 + ... + 12346.

It is an arithmetic number, because the mean of its divisors is an integer number (37026).

2¹²³⁴¹⁵ is an apocalyptic number.

123415 is a deficient number, since it is larger than the sum of its proper divisors (24689).

123415 is an equidigital number, since it uses as much as digits as its factorization.

123415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24688.

The product of its digits is 120, while the sum is 16.

The square root of 123415 is about 351.3047110416. The cubic root of 123415 is about 49.7877670851.

Adding to 123415 its reverse (514321), we get a palindrome (637736).

The spelling of 123415 in words is "one hundred twenty-three thousand, four hundred fifteen".