2104281 has 12 divisors (see below), whose sum is σ = 3055780. Its totient is φ = 1395360.

The previous prime is 2104273. The next prime is 2104313. The reversal of 2104281 is 1824012.

It can be written as a sum of positive squares in 2 ways, for example, as 1648656 + 455625 = 1284^2 + 675^2 .

It is not a de Polignac number, because 2104281 - 2³ = 2104273 is a prime.

It is a super-2 number, since 2×2104281² = 8855997053922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2104241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1551 + ... + 2571.

2^2104281 is an apocalyptic number.

It is an amenable number.

2104281 is a deficient number, since it is larger than the sum of its proper divisors (951499).

2104281 is a wasteful number, since it uses less digits than its factorization.

2104281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256 (or 1253 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 2104281 is about 1450.6140079291. The cubic root of 2104281 is about 128.1448758378.

Adding to 2104281 its reverse (1824012), we get a palindrome (3928293).

The spelling of 2104281 in words is "two million, one hundred four thousand, two hundred eighty-one".