123243445 has 24 divisors (see below), whose sum is σ = 164655288. Its totient is φ = 88030080.

The previous prime is 123243409. The next prime is 123243473. The reversal of 123243445 is 544342321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 77841 + 123165604 = 279^2 + 11098^2 .

It is not a de Polignac number, because 123243445 - 2¹⁵ = 123210677 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 23 ways as a sum of consecutive naturals, for example, 61479 + ... + 63451.

It is an arithmetic number, because the mean of its divisors is an integer number (6860637).

Almost surely, 2^123243445 is an apocalyptic number.

It is an amenable number.

123243445 is a deficient number, since it is larger than the sum of its proper divisors (41411843).

123243445 is a wasteful number, since it uses less digits than its factorization.

123243445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053 (or 2022 counting only the distinct ones).

The product of its digits is 11520, while the sum is 28.

The square root of 123243445 is about 11101.5064293095. The cubic root of 123243445 is about 497.6468695943.

Adding to 123243445 its reverse (544342321), we get a palindrome (667585766).

The spelling of 123243445 in words is "one hundred twenty-three million, two hundred forty-three thousand, four hundred forty-five".