123530 has 16 divisors (see below), whose sum is σ = 242784. Its totient is φ = 44880.

The previous prime is 123527. The next prime is 123547. The reversal of 123530 is 35321.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452 + ... + 671.

It is an arithmetic number, because the mean of its divisors is an integer number (15174).

2¹²³⁵³⁰ is an apocalyptic number.

123530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123530 is a deficient number, since it is larger than the sum of its proper divisors (119254).

123530 is a wasteful number, since it uses less digits than its factorization.

123530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141.

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 123530 is about 351.4683485038. The cubic root of 123530 is about 49.8032266206.

Adding to 123530 its reverse (35321), we get a palindrome (158851).

Subtracting from 123530 its reverse (35321), we obtain a square (88209 = 297²).

The spelling of 123530 in words is "one hundred twenty-three thousand, five hundred thirty".