2127681 has 8 divisors (see below), whose sum is σ = 3152160. Its totient is φ = 1418436.

The previous prime is 2127679. The next prime is 2127689. The reversal of 2127681 is 1867212.

It is not a de Polignac number, because 2127681 - 2¹ = 2127679 is a prime.

It is a super-2 number, since 2×2127681² = 9054052875522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 78803 = 2127681 / (2 + 1 + 2 + 7 + 6 + 8 + 1).

It is not an unprimeable number, because it can be changed into a prime (2127689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39375 + ... + 39428.

It is an arithmetic number, because the mean of its divisors is an integer number (394020).

2^2127681 is an apocalyptic number.

It is an amenable number.

2127681 is a deficient number, since it is larger than the sum of its proper divisors (1024479).

2127681 is an equidigital number, since it uses as much as digits as its factorization.

2127681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78812 (or 78806 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 2127681 is about 1458.6572592628. The cubic root of 2127681 is about 128.6181243084.

The spelling of 2127681 in words is "two million, one hundred twenty-seven thousand, six hundred eighty-one".