123140045 has 64 divisors (see below), whose sum is σ = 189665280. Its totient is φ = 74815488.

The previous prime is 123140011. The next prime is 123140063. The reversal of 123140045 is 540041321.

It is a cyclic number.

It is not a de Polignac number, because 123140045 - 2⁶ = 123139981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123139999 and 123140026.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1269437 + ... + 1269533.

It is an arithmetic number, because the mean of its divisors is an integer number (2963520).

Almost surely, 2^123140045 is an apocalyptic number.

It is an amenable number.

123140045 is a deficient number, since it is larger than the sum of its proper divisors (66525235).

123140045 is a wasteful number, since it uses less digits than its factorization.

123140045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 123140045 is about 11096.8484264678. The cubic root of 123140045 is about 497.5076570962.

Adding to 123140045 its reverse (540041321), we get a palindrome (663181366).

The spelling of 123140045 in words is "one hundred twenty-three million, one hundred forty thousand, forty-five".