123730 has 8 divisors (see below), whose sum is σ = 222732. Its totient is φ = 49488.

The previous prime is 123727. The next prime is 123731. The reversal of 123730 is 37321.

Added to its reverse (37321) it gives a 5-th power (161051 = 11⁵).

It can be written as a sum of positive squares in 2 ways, for example, as 123201 + 529 = 351^2 + 23^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×123730² = 30618225800, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (123731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6177 + ... + 6196.

2¹²³⁷³⁰ is an apocalyptic number.

123730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123730 is a deficient number, since it is larger than the sum of its proper divisors (99002).

123730 is a wasteful number, since it uses less digits than its factorization.

123730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12380.

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 123730 is about 351.7527540759. The cubic root of 123730 is about 49.8300899321.

Adding to 123730 its reverse (37321), we get a 5-th power (161051 = 11⁵).

The spelling of 123730 in words is "one hundred twenty-three thousand, seven hundred thirty".