123700 has 18 divisors (see below), whose sum is σ = 268646. Its totient is φ = 49440.

The previous prime is 123677. The next prime is 123701. The reversal of 123700 is 7321.

It can be written as a sum of positive squares in 3 ways, for example, as 17424 + 106276 = 132^2 + 326^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123701) 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, 519 + ... + 718.

2¹²³⁷⁰⁰ is an apocalyptic number.

123700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123700 is an abundant number, since it is smaller than the sum of its proper divisors (144946).

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

123700 is a wasteful number, since it uses less digits than its factorization.

123700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251 (or 1244 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 13.

The square root of 123700 is about 351.7101079014. The cubic root of 123700 is about 49.8260622817.

The spelling of 123700 in words is "one hundred twenty-three thousand, seven hundred", and thus it is an iban number.