2665287 has 24 divisors (see below), whose sum is σ = 4088448. Its totient is φ = 1670400.

The previous prime is 2665261. The next prime is 2665291. The reversal of 2665287 is 7825662.

2665287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2665287 - 2⁸ = 2665031 is a prime.

It is an Ulam number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2665237) 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 23 ways as a sum of consecutive naturals, for example, 11323 + ... + 11555.

It is an arithmetic number, because the mean of its divisors is an integer number (170352).

2^2665287 is an apocalyptic number.

2665287 is a deficient number, since it is larger than the sum of its proper divisors (1423161).

2665287 is a wasteful number, since it uses less digits than its factorization.

2665287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311 (or 308 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 2665287 is about 1632.5706722834. The cubic root of 2665287 is about 138.6483355586.

The spelling of 2665287 in words is "two million, six hundred sixty-five thousand, two hundred eighty-seven".