2865281 has 4 divisors (see below), whose sum is σ = 2868672. Its totient is φ = 2861892.

The previous prime is 2865277. The next prime is 2865307. The reversal of 2865281 is 1825682.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2865281 - 2² = 2865277 is a prime.

It is a super-2 number, since 2×2865281² = 16419670417922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2865211) 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, 716 + ... + 2498.

It is an arithmetic number, because the mean of its divisors is an integer number (717168).

2^2865281 is an apocalyptic number.

It is an amenable number.

2865281 is a deficient number, since it is larger than the sum of its proper divisors (3391).

2865281 is a wasteful number, since it uses less digits than its factorization.

2865281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3390.

The product of its digits is 7680, while the sum is 32.

The square root of 2865281 is about 1692.7140928107. The cubic root of 2865281 is about 142.0329388641.

The spelling of 2865281 in words is "two million, eight hundred sixty-five thousand, two hundred eighty-one".