2681281 has 4 divisors (see below), whose sum is σ = 2691972. Its totient is φ = 2670592.

The previous prime is 2681267. The next prime is 2681293. The reversal of 2681281 is 1821862.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2310400 + 370881 = 1520^2 + 609^2 .

It is a cyclic number.

It is not a de Polignac number, because 2681281 - 2⁵ = 2681249 is a prime.

It is a super-2 number, since 2×2681281² = 14378535601922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2681201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4960 + ... + 5473.

It is an arithmetic number, because the mean of its divisors is an integer number (672993).

2^2681281 is an apocalyptic number.

It is an amenable number.

2681281 is a deficient number, since it is larger than the sum of its proper divisors (10691).

2681281 is a wasteful number, since it uses less digits than its factorization.

2681281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10690.

The product of its digits is 1536, while the sum is 28.

The square root of 2681281 is about 1637.4617552786. The cubic root of 2681281 is about 138.9251188210.

The spelling of 2681281 in words is "two million, six hundred eighty-one thousand, two hundred eighty-one".