2405939 has 4 divisors (see below), whose sum is σ = 2419560. Its totient is φ = 2392320.

The previous prime is 2405929. The next prime is 2405971. The reversal of 2405939 is 9395042.

2405939 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2405939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2405929) 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, 6542 + ... + 6899.

It is an arithmetic number, because the mean of its divisors is an integer number (604890).

2^2405939 is an apocalyptic number.

2405939 is a deficient number, since it is larger than the sum of its proper divisors (13621).

2405939 is a wasteful number, since it uses less digits than its factorization.

2405939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13620.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 2405939 is about 1551.1089581329. The cubic root of 2405939 is about 133.9969368870.

The spelling of 2405939 in words is "two million, four hundred five thousand, nine hundred thirty-nine".