123040307 has 12 divisors (see below), whose sum is σ = 133731360. Its totient is φ = 112532112.

The previous prime is 123040297. The next prime is 123040319. The reversal of 123040307 is 703040321.

It is a de Polignac number, because none of the positive numbers 2^k-123040307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123040327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 514694 + ... + 514932.

It is an arithmetic number, because the mean of its divisors is an integer number (11144280).

Almost surely, 2^123040307 is an apocalyptic number.

123040307 is a deficient number, since it is larger than the sum of its proper divisors (10691053).

123040307 is an equidigital number, since it uses as much as digits as its factorization.

123040307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 123040307 is about 11092.3535374599. The cubic root of 123040307 is about 497.3733010695.

Adding to 123040307 its reverse (703040321), we get a palindrome (826080628).

The spelling of 123040307 in words is "one hundred twenty-three million, forty thousand, three hundred seven".