123115445 has 12 divisors (see below), whose sum is σ = 156942084. Its totient is φ = 92697600.

The previous prime is 123115441. The next prime is 123115453. The reversal of 123115445 is 544511321.

It can be written as a sum of positive squares in 6 ways, for example, as 9778129 + 113337316 = 3127^2 + 10646^2 .

It is not a de Polignac number, because 123115445 - 2² = 123115441 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123115441) 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 11 ways as a sum of consecutive naturals, for example, 41156 + ... + 44045.

It is an arithmetic number, because the mean of its divisors is an integer number (13078507).

Almost surely, 2^123115445 is an apocalyptic number.

It is an amenable number.

123115445 is a deficient number, since it is larger than the sum of its proper divisors (33826639).

123115445 is an equidigital number, since it uses as much as digits as its factorization.

123115445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85240 (or 85223 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 123115445 is about 11095.7399482865. The cubic root of 123115445 is about 497.4745254331.

Adding to 123115445 its reverse (544511321), we get a palindrome (667626766).

The spelling of 123115445 in words is "one hundred twenty-three million, one hundred fifteen thousand, four hundred forty-five".