123780075 has 12 divisors (see below), whose sum is σ = 204649848. Its totient is φ = 66016000.

The previous prime is 123780071. The next prime is 123780109. The reversal of 123780075 is 570087321.

It is not a de Polignac number, because 123780075 - 2² = 123780071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123780071) 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, 825126 + ... + 825275.

It is an arithmetic number, because the mean of its divisors is an integer number (17054154).

Almost surely, 2^123780075 is an apocalyptic number.

123780075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123780075 is a deficient number, since it is larger than the sum of its proper divisors (80869773).

123780075 is a wasteful number, since it uses less digits than its factorization.

123780075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650414 (or 1650409 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 123780075 is about 11125.6494192474. The cubic root of 123780075 is about 498.3681130175.

The spelling of 123780075 in words is "one hundred twenty-three million, seven hundred eighty thousand, seventy-five".