2439645 has 16 divisors (see below), whose sum is σ = 4204032. Its totient is φ = 1200960.

The previous prime is 2439641. The next prime is 2439649. The reversal of 2439645 is 5469342.

It is an interprime number because it is at equal distance from previous prime (2439641) and next prime (2439649).

It is not a de Polignac number, because 2439645 - 2² = 2439641 is a prime.

It is a super-3 number, since 3×2439645³ = 43561333015374783375, which contains 333 as substring.

It is a Curzon number.

2439645 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2439641) 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 15 ways as a sum of consecutive naturals, for example, 6061 + ... + 6450.

It is an arithmetic number, because the mean of its divisors is an integer number (262752).

2^2439645 is an apocalyptic number.

It is an amenable number.

2439645 is a deficient number, since it is larger than the sum of its proper divisors (1764387).

2439645 is a wasteful number, since it uses less digits than its factorization.

2439645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12532.

The product of its digits is 25920, while the sum is 33.

The square root of 2439645 is about 1561.9362983169. The cubic root of 2439645 is about 134.6197806204.

The spelling of 2439645 in words is "two million, four hundred thirty-nine thousand, six hundred forty-five".