2645863 has 8 divisors (see below), whose sum is σ = 3056400. Its totient is φ = 2263680.

The previous prime is 2645861. The next prime is 2645879. The reversal of 2645863 is 3685462.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2645863 - 2¹ = 2645861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6888 + ... + 7261.

It is an arithmetic number, because the mean of its divisors is an integer number (382050).

2^2645863 is an apocalyptic number.

2645863 is a deficient number, since it is larger than the sum of its proper divisors (410537).

2645863 is a wasteful number, since it uses less digits than its factorization.

2645863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14177.

The product of its digits is 34560, while the sum is 34.

The square root of 2645863 is about 1626.6108938526. The cubic root of 2645863 is about 138.3107016088.

The spelling of 2645863 in words is "two million, six hundred forty-five thousand, eight hundred sixty-three".