123550 has 24 divisors (see below), whose sum is σ = 263376. Its totient is φ = 42240.

The previous prime is 123547. The next prime is 123551. The reversal of 123550 is 55321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 174 + ... + 526.

It is an arithmetic number, because the mean of its divisors is an integer number (10974).

2¹²³⁵⁵⁰ is an apocalyptic number.

123550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123550 is an abundant number, since it is smaller than the sum of its proper divisors (139826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123550 is a wasteful number, since it uses less digits than its factorization.

123550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 123550 is about 351.4967994164. The cubic root of 123550 is about 49.8059142560.

Adding to 123550 its reverse (55321), we get a palindrome (178871).

The spelling of 123550 in words is "one hundred twenty-three thousand, five hundred fifty".