2645339 has 4 divisors (see below), whose sum is σ = 2649360. Its totient is φ = 2641320.

The previous prime is 2645329. The next prime is 2645341. The reversal of 2645339 is 9335462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9335462 = 2 ⋅4667731.

It is a cyclic number.

It is not a de Polignac number, because 2645339 - 2¹⁶ = 2579803 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 (2645329) 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, 767 + ... + 2424.

It is an arithmetic number, because the mean of its divisors is an integer number (662340).

2^2645339 is an apocalyptic number.

2645339 is a deficient number, since it is larger than the sum of its proper divisors (4021).

2645339 is an equidigital number, since it uses as much as digits as its factorization.

2645339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4020.

The product of its digits is 19440, while the sum is 32.

The square root of 2645339 is about 1626.4498147806. The cubic root of 2645339 is about 138.3015704239.

The spelling of 2645339 in words is "two million, six hundred forty-five thousand, three hundred thirty-nine".