127131720 has 64 divisors (see below), whose sum is σ = 383279040. Its totient is φ = 33734400.

The previous prime is 127131709. The next prime is 127131721. The reversal of 127131720 is 27131721.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (127131721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22810 + ... + 27830.

It is an arithmetic number, because the mean of its divisors is an integer number (5988735).

Almost surely, 2^127131720 is an apocalyptic number.

127131720 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 127131720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191639520).

127131720 is an abundant number, since it is smaller than the sum of its proper divisors (256147320).

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

127131720 is a wasteful number, since it uses less digits than its factorization.

127131720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5246 (or 5242 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 24.

The square root of 127131720 is about 11275.2702850087. The cubic root of 127131720 is about 502.8262874306.

Subtracting from 127131720 its reverse (27131721), we obtain a palindrome (99999999).

The spelling of 127131720 in words is "one hundred twenty-seven million, one hundred thirty-one thousand, seven hundred twenty".