123529 has 6 divisors (see below), whose sum is σ = 143754. Its totient is φ = 105840.

The previous prime is 123527. The next prime is 123547. The reversal of 123529 is 925321.

It can be written as a sum of positive squares in only one way, i.e., 63504 + 60025 = 252^2 + 245^2 .

It is not a de Polignac number, because 123529 - 2¹ = 123527 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1212 + ... + 1309.

It is an arithmetic number, because the mean of its divisors is an integer number (23959).

2¹²³⁵²⁹ is an apocalyptic number.

It is an amenable number.

123529 is a deficient number, since it is larger than the sum of its proper divisors (20225).

123529 is an equidigital number, since it uses as much as digits as its factorization.

123529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2535 (or 2528 counting only the distinct ones).

The product of its digits is 540, while the sum is 22.

The square root of 123529 is about 351.4669258977. The cubic root of 123529 is about 49.8030922312.

The spelling of 123529 in words is "one hundred twenty-three thousand, five hundred twenty-nine".