127730 has 16 divisors (see below), whose sum is σ = 235224. Its totient is φ = 49920.

The previous prime is 127727. The next prime is 127733. The reversal of 127730 is 37721.

It is an interprime number because it is at equal distance from previous prime (127727) and next prime (127733).

It can be written as a sum of positive squares in 4 ways, for example, as 121801 + 5929 = 349^2 + 77^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410 + ... + 650.

2¹²⁷⁷³⁰ is an apocalyptic number.

127730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

127730 is a deficient number, since it is larger than the sum of its proper divisors (107494).

127730 is a wasteful number, since it uses less digits than its factorization.

127730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301.

The product of its (nonzero) digits is 294, while the sum is 20.

The square root of 127730 is about 357.3933407326. The cubic root of 127730 is about 50.3613817716.

Subtracting from 127730 its reverse (37721), we obtain a palindrome (90009).

The spelling of 127730 in words is "one hundred twenty-seven thousand, seven hundred thirty".