2127720 has 128 divisors (see below), whose sum is σ = 7776000. Its totient is φ = 454656.

The previous prime is 2127691. The next prime is 2127721. The reversal of 2127720 is 277212.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (2127721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14206 + ... + 14354.

It is an arithmetic number, because the mean of its divisors is an integer number (60750).

2^2127720 is an apocalyptic number.

2127720 is a gapful number since it is divisible by the number (20) 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 2127720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3888000).

2127720 is an abundant number, since it is smaller than the sum of its proper divisors (5648280).

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

2127720 is a wasteful number, since it uses less digits than its factorization.

2127720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 2127720 is about 1458.6706276607. The cubic root of 2127720 is about 128.6189101524.

The spelling of 2127720 in words is "two million, one hundred twenty-seven thousand, seven hundred twenty".