123240115 has 8 divisors (see below), whose sum is σ = 147950928. Its totient is φ = 98550240.

The previous prime is 123240109. The next prime is 123240119. The reversal of 123240115 is 511042321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123240115 - 2⁵ = 123240083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123240092 and 123240101.

It is not an unprimeable number, because it can be changed into a prime (123240119) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 14464 + ... + 21346.

It is an arithmetic number, because the mean of its divisors is an integer number (18493866).

Almost surely, 2^123240115 is an apocalyptic number.

123240115 is a deficient number, since it is larger than the sum of its proper divisors (24710813).

123240115 is an equidigital number, since it uses as much as digits as its factorization.

123240115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10469.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 123240115 is about 11101.3564486508. The cubic root of 123240115 is about 497.6423874655.

Adding to 123240115 its reverse (511042321), we get a palindrome (634282436).

The spelling of 123240115 in words is "one hundred twenty-three million, two hundred forty thousand, one hundred fifteen".