123281307 has 12 divisors (see below), whose sum is σ = 179837424. Its totient is φ = 81373200.

The previous prime is 123281303. The next prime is 123281341. The reversal of 123281307 is 703182321.

It is not a de Polignac number, because 123281307 - 2² = 123281303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123281303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66903 + ... + 68720.

It is an arithmetic number, because the mean of its divisors is an integer number (14986452).

Almost surely, 2^123281307 is an apocalyptic number.

123281307 is a deficient number, since it is larger than the sum of its proper divisors (56556117).

123281307 is a wasteful number, since it uses less digits than its factorization.

123281307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135730 (or 135727 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 123281307 is about 11103.2115624264. The cubic root of 123281307 is about 497.6978255880.

The spelling of 123281307 in words is "one hundred twenty-three million, two hundred eighty-one thousand, three hundred seven".