2645287 has 4 divisors (see below), whose sum is σ = 2672656. Its totient is φ = 2617920.

The previous prime is 2645267. The next prime is 2645297. The reversal of 2645287 is 7825462.

2645287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2645287 - 2¹¹ = 2643239 is a prime.

It is a Duffinian number.

2645287 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13539 + ... + 13732.

It is an arithmetic number, because the mean of its divisors is an integer number (668164).

2^2645287 is an apocalyptic number.

2645287 is a deficient number, since it is larger than the sum of its proper divisors (27369).

2645287 is an equidigital number, since it uses as much as digits as its factorization.

2645287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27368.

The product of its digits is 26880, while the sum is 34.

The square root of 2645287 is about 1626.4338289645. The cubic root of 2645287 is about 138.3006642100.

The spelling of 2645287 in words is "two million, six hundred forty-five thousand, two hundred eighty-seven".