123450 has 24 divisors (see below), whose sum is σ = 306528. Its totient is φ = 32880.

The previous prime is 123449. The next prime is 123457. The reversal of 123450 is 54321.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (123457) 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, 262 + ... + 561.

It is an arithmetic number, because the mean of its divisors is an integer number (12772).

2¹²³⁴⁵⁰ is an apocalyptic number.

123450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123450 is an abundant number, since it is smaller than the sum of its proper divisors (183078).

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

123450 is a wasteful number, since it uses less digits than its factorization.

123450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838 (or 833 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 123450 is about 351.3545218152. The cubic root of 123450 is about 49.7924731774.

Adding to 123450 its reverse (54321), we get a palindrome (177771).

The spelling of 123450 in words is "one hundred twenty-three thousand, four hundred fifty".