123125215 has 4 divisors (see below), whose sum is σ = 147750264. Its totient is φ = 98500168.

The previous prime is 123125207. The next prime is 123125251. The reversal of 123125215 is 512521321.

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 123125215 - 2³ = 123125207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12312517 + ... + 12312526.

It is an arithmetic number, because the mean of its divisors is an integer number (36937566).

Almost surely, 2^123125215 is an apocalyptic number.

123125215 is a deficient number, since it is larger than the sum of its proper divisors (24625049).

123125215 is an equidigital number, since it uses as much as digits as its factorization.

123125215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24625048.

The product of its digits is 600, while the sum is 22.

The square root of 123125215 is about 11096.1801986089. The cubic root of 123125215 is about 497.4876843496.

Adding to 123125215 its reverse (512521321), we get a palindrome (635646536).

The spelling of 123125215 in words is "one hundred twenty-three million, one hundred twenty-five thousand, two hundred fifteen".