123575 has 6 divisors (see below), whose sum is σ = 153264. Its totient is φ = 98840.

The previous prime is 123553. The next prime is 123581. The reversal of 123575 is 575321.

Added to its reverse (575321) it gives a square (698896 = 836²).

It is a de Polignac number, because none of the positive numbers 2^k-123575 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123575.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2447 + ... + 2496.

It is an arithmetic number, because the mean of its divisors is an integer number (25544).

2¹²³⁵⁷⁵ is an apocalyptic number.

123575 is a deficient number, since it is larger than the sum of its proper divisors (29689).

123575 is an equidigital number, since it uses as much as digits as its factorization.

123575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4953 (or 4948 counting only the distinct ones).

The product of its digits is 1050, while the sum is 23.

The square root of 123575 is about 351.5323598191. The cubic root of 123575 is about 49.8092733923.

Adding to 123575 its reverse (575321), we get a palindrome (698896).

The spelling of 123575 in words is "one hundred twenty-three thousand, five hundred seventy-five".