123315445 has 32 divisors (see below), whose sum is σ = 165680640. Its totient is φ = 87360000.

The previous prime is 123315403. The next prime is 123315449. The reversal of 123315445 is 544513321.

It is not a de Polignac number, because 123315445 - 2⁷ = 123315317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123315449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 438705 + ... + 438985.

It is an arithmetic number, because the mean of its divisors is an integer number (5177520).

Almost surely, 2^123315445 is an apocalyptic number.

It is an amenable number.

123315445 is a deficient number, since it is larger than the sum of its proper divisors (42365195).

123315445 is a wasteful number, since it uses less digits than its factorization.

123315445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477.

The product of its digits is 7200, while the sum is 28.

The square root of 123315445 is about 11104.7487589769. The cubic root of 123315445 is about 497.7437607498.

Adding to 123315445 its reverse (544513321), we get a palindrome (667828766).

The spelling of 123315445 in words is "one hundred twenty-three million, three hundred fifteen thousand, four hundred forty-five".