2128281 has 16 divisors (see below), whose sum is σ = 3110400. Its totient is φ = 1288448.

The previous prime is 2128279. The next prime is 2128283. The reversal of 2128281 is 1828212.

It is an interprime number because it is at equal distance from previous prime (2128279) and next prime (2128283).

It is a cyclic number.

It is not a de Polignac number, because 2128281 - 2¹ = 2128279 is a prime.

It is a super-2 number, since 2×2128281² = 9059160029922, which contains 22 as substring.

It is a Curzon number.

2128281 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2128283) 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, 760 + ... + 2198.

It is an arithmetic number, because the mean of its divisors is an integer number (194400).

2^2128281 is an apocalyptic number.

It is an amenable number.

2128281 is a deficient number, since it is larger than the sum of its proper divisors (982119).

2128281 is a wasteful number, since it uses less digits than its factorization.

2128281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488.

The product of its digits is 512, while the sum is 24.

The square root of 2128281 is about 1458.8629133678. The cubic root of 2128281 is about 128.6302131541.

The spelling of 2128281 in words is "two million, one hundred twenty-eight thousand, two hundred eighty-one".