2645803 has 4 divisors (see below), whose sum is σ = 2649208. Its totient is φ = 2642400.

The previous prime is 2645779. The next prime is 2645809. The reversal of 2645803 is 3085462.

It is a semiprime because it is the product of two primes, 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 2645803 - 2¹³ = 2637611 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2645809) 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, 100 + ... + 2302.

It is an arithmetic number, because the mean of its divisors is an integer number (662302).

2^2645803 is an apocalyptic number.

2645803 is a deficient number, since it is larger than the sum of its proper divisors (3405).

2645803 is a wasteful number, since it uses less digits than its factorization.

2645803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3404.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 2645803 is about 1626.5924504927. The cubic root of 2645803 is about 138.3096561144.

The spelling of 2645803 in words is "two million, six hundred forty-five thousand, eight hundred three".