2646281 has 4 divisors (see below), whose sum is σ = 2886864. Its totient is φ = 2405700.

The previous prime is 2646269. The next prime is 2646353. The reversal of 2646281 is 1826462.

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 2646281 - 2¹⁰ = 2645257 is a prime.

It is a super-2 number, since 2×2646281² = 14005606261922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2646211) 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, 120275 + ... + 120296.

It is an arithmetic number, because the mean of its divisors is an integer number (721716).

2^2646281 is an apocalyptic number.

2646281 is the 728-th centered decagonal number.

It is an amenable number.

2646281 is a deficient number, since it is larger than the sum of its proper divisors (240583).

2646281 is a wasteful number, since it uses less digits than its factorization.

2646281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240582.

The product of its digits is 4608, while the sum is 29.

The square root of 2646281 is about 1626.7393767903. The cubic root of 2646281 is about 138.3179847812.

The spelling of 2646281 in words is "two million, six hundred forty-six thousand, two hundred eighty-one".