123740 has 24 divisors (see below), whose sum is σ = 272160. Its totient is φ = 47168.

The previous prime is 123737. The next prime is 123757. The reversal of 123740 is 47321.

It is a happy number.

It is a congruent number.

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, 326 + ... + 594.

It is an arithmetic number, because the mean of its divisors is an integer number (11340).

2¹²³⁷⁴⁰ is an apocalyptic number.

123740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136080).

123740 is an abundant number, since it is smaller than the sum of its proper divisors (148420).

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

123740 is a wasteful number, since it uses less digits than its factorization.

123740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 123740 is about 351.7669683185. The cubic root of 123740 is about 49.8314323375.

The spelling of 123740 in words is "one hundred twenty-three thousand, seven hundred forty", and thus it is an iban number.