123075545 has 4 divisors (see below), whose sum is σ = 147690660. Its totient is φ = 98460432.

The previous prime is 123075539. The next prime is 123075551. The reversal of 123075545 is 545570321.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (123075539) and next prime (123075551).

It can be written as a sum of positive squares in 2 ways, for example, as 27290176 + 95785369 = 5224^2 + 9787^2 .

It is a cyclic number.

It is not a de Polignac number, because 123075545 - 2²² = 118881241 is a prime.

It is a Curzon 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 3 ways as a sum of consecutive naturals, for example, 12307550 + ... + 12307559.

It is an arithmetic number, because the mean of its divisors is an integer number (36922665).

Almost surely, 2^123075545 is an apocalyptic number.

It is an amenable number.

123075545 is a deficient number, since it is larger than the sum of its proper divisors (24615115).

123075545 is an equidigital number, since it uses as much as digits as its factorization.

123075545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24615114.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 123075545 is about 11093.9418152431. The cubic root of 123075545 is about 497.4207781061.

The spelling of 123075545 in words is "one hundred twenty-three million, seventy-five thousand, five hundred forty-five".