2399545 has 4 divisors (see below), whose sum is σ = 2879460. Its totient is φ = 1919632.

The previous prime is 2399543. The next prime is 2399549. The reversal of 2399545 is 5459932.

2399545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 881721 + 1517824 = 939^2 + 1232^2 .

It is a cyclic number.

It is not a de Polignac number, because 2399545 - 2¹ = 2399543 is a prime.

2399545 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2399543) 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 3 ways as a sum of consecutive naturals, for example, 239950 + ... + 239959.

It is an arithmetic number, because the mean of its divisors is an integer number (719865).

2^2399545 is an apocalyptic number.

It is an amenable number.

2399545 is a deficient number, since it is larger than the sum of its proper divisors (479915).

2399545 is an equidigital number, since it uses as much as digits as its factorization.

2399545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479914.

The product of its digits is 48600, while the sum is 37.

The square root of 2399545 is about 1549.0464809037. The cubic root of 2399545 is about 133.8781285930.

The spelling of 2399545 in words is "two million, three hundred ninety-nine thousand, five hundred forty-five".