123997215 has 16 divisors (see below), whose sum is σ = 200908800. Its totient is φ = 65294112.

The previous prime is 123997207. The next prime is 123997217. The reversal of 123997215 is 512799321.

It is not a de Polignac number, because 123997215 - 2³ = 123997207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123997217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51135 + ... + 53504.

It is an arithmetic number, because the mean of its divisors is an integer number (12556800).

Almost surely, 2^123997215 is an apocalyptic number.

123997215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123997215 is a deficient number, since it is larger than the sum of its proper divisors (76911585).

123997215 is a wasteful number, since it uses less digits than its factorization.

123997215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104726.

The product of its digits is 34020, while the sum is 39.

The square root of 123997215 is about 11135.4036747664. The cubic root of 123997215 is about 498.6593619252.

The spelling of 123997215 in words is "one hundred twenty-three million, nine hundred ninety-seven thousand, two hundred fifteen".