123971315 has 16 divisors (see below), whose sum is σ = 161773248. Its totient is φ = 90654336.

The previous prime is 123971297. The next prime is 123971347. The reversal of 123971315 is 513179321.

It is a cyclic number.

It is not a de Polignac number, because 123971315 - 2⁶ = 123971251 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2564 + ... + 15953.

It is an arithmetic number, because the mean of its divisors is an integer number (10110828).

Almost surely, 2^123971315 is an apocalyptic number.

123971315 is a deficient number, since it is larger than the sum of its proper divisors (37801933).

123971315 is a wasteful number, since it uses less digits than its factorization.

123971315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18638.

The product of its digits is 5670, while the sum is 32.

The square root of 123971315 is about 11134.2406566411. The cubic root of 123971315 is about 498.6246402399.

The spelling of 123971315 in words is "one hundred twenty-three million, nine hundred seventy-one thousand, three hundred fifteen".