2149439 has 4 divisors (see below), whose sum is σ = 2173680. Its totient is φ = 2125200.

The previous prime is 2149421. The next prime is 2149453. The reversal of 2149439 is 9349412.

It is a happy number.

2149439 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 not a de Polignac number, because 2149439 - 2¹² = 2145343 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2149409) 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, 11987 + ... + 12164.

It is an arithmetic number, because the mean of its divisors is an integer number (543420).

2^2149439 is an apocalyptic number.

2149439 is a deficient number, since it is larger than the sum of its proper divisors (24241).

2149439 is an equidigital number, since it uses as much as digits as its factorization.

2149439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24240.

The product of its digits is 7776, while the sum is 32.

The square root of 2149439 is about 1466.0965179687. The cubic root of 2149439 is about 129.0550613254.

The spelling of 2149439 in words is "two million, one hundred forty-nine thousand, four hundred thirty-nine".