123345045 has 32 divisors (see below), whose sum is σ = 223430400. Its totient is φ = 64539072.

The previous prime is 123345043. The next prime is 123345059. The reversal of 123345045 is 540543321.

123345045 is a `hidden beast` number, since 123 + 34 + 504 + 5 = 666.

It is not a de Polignac number, because 123345045 - 2¹ = 123345043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123345043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1465 + ... + 15774.

It is an arithmetic number, because the mean of its divisors is an integer number (6982200).

Almost surely, 2^123345045 is an apocalyptic number.

123345045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123345045 is a deficient number, since it is larger than the sum of its proper divisors (100085355).

123345045 is a wasteful number, since it uses less digits than its factorization.

123345045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17306 (or 17300 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 123345045 is about 11106.0814421649. The cubic root of 123345045 is about 497.7835828408.

Adding to 123345045 its reverse (540543321), we get a palindrome (663888366).

The spelling of 123345045 in words is "one hundred twenty-three million, three hundred forty-five thousand, forty-five".