127640 has 16 divisors (see below), whose sum is σ = 287280. Its totient is φ = 51040.

The previous prime is 127637. The next prime is 127643. The reversal of 127640 is 46721.

It is an interprime number because it is at equal distance from previous prime (127637) and next prime (127643).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127643) 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, 1556 + ... + 1635.

It is an arithmetic number, because the mean of its divisors is an integer number (17955).

2¹²⁷⁶⁴⁰ is an apocalyptic number.

127640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127640 is an abundant number, since it is smaller than the sum of its proper divisors (159640).

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

127640 is a wasteful number, since it uses less digits than its factorization.

127640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3202 (or 3198 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 127640 is about 357.2674068537. The cubic root of 127640 is about 50.3495505930.

It can be divided in two parts, 1276 and 40, that multiplied together give a triangular number (51040 = T₃₁₉).

The spelling of 127640 in words is "one hundred twenty-seven thousand, six hundred forty".