123243115 has 32 divisors (see below), whose sum is σ = 162518400. Its totient is φ = 89339904.

The previous prime is 123243103. The next prime is 123243151. The reversal of 123243115 is 511342321.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-123243115 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 468474 + ... + 468736.

It is an arithmetic number, because the mean of its divisors is an integer number (5078700).

Almost surely, 2^123243115 is an apocalyptic number.

123243115 is a deficient number, since it is larger than the sum of its proper divisors (39275285).

123243115 is a wasteful number, since it uses less digits than its factorization.

123243115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471.

The product of its digits is 720, while the sum is 22.

The square root of 123243115 is about 11101.4915664518. The cubic root of 123243115 is about 497.6464254230.

Adding to 123243115 its reverse (511342321), we get a palindrome (634585436).

The spelling of 123243115 in words is "one hundred twenty-three million, two hundred forty-three thousand, one hundred fifteen".