2127881 has 4 divisors (see below), whose sum is σ = 2431872. Its totient is φ = 1823892.

The previous prime is 2127857. The next prime is 2127883. The reversal of 2127881 is 1887212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2127881 - 2¹⁰ = 2126857 is a prime.

It is a super-2 number, since 2×2127881² = 9055755100322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2127883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151985 + ... + 151998.

It is an arithmetic number, because the mean of its divisors is an integer number (607968).

2^2127881 is an apocalyptic number.

It is an amenable number.

2127881 is a deficient number, since it is larger than the sum of its proper divisors (303991).

2127881 is an equidigital number, since it uses as much as digits as its factorization.

2127881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303990.

The product of its digits is 1792, while the sum is 29.

The square root of 2127881 is about 1458.7258138526. The cubic root of 2127881 is about 128.6221541761.

The spelling of 2127881 in words is "two million, one hundred twenty-seven thousand, eight hundred eighty-one".