12449405 has 4 divisors (see below), whose sum is σ = 14939292. Its totient is φ = 9959520.

The previous prime is 12449399. The next prime is 12449431. The reversal of 12449405 is 50494421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50494421 = 1733 ⋅29137.

It can be written as a sum of positive squares in 2 ways, for example, as 1413721 + 11035684 = 1189^2 + 3322^2 .

It is not a de Polignac number, because 12449405 - 2¹⁴ = 12433021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1244936 + ... + 1244945.

It is an arithmetic number, because the mean of its divisors is an integer number (3734823).

Almost surely, 2^12449405 is an apocalyptic number.

It is an amenable number.

12449405 is a deficient number, since it is larger than the sum of its proper divisors (2489887).

12449405 is an equidigital number, since it uses as much as digits as its factorization.

12449405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2489886.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 12449405 is about 3528.3714373631. The cubic root of 12449405 is about 231.7658966817.

The spelling of 12449405 in words is "twelve million, four hundred forty-nine thousand, four hundred five".