12401405 has 4 divisors (see below), whose sum is σ = 14881692. Its totient is φ = 9921120.

The previous prime is 12401399. The next prime is 12401429. The reversal of 12401405 is 50410421.

12401405 is digitally balanced in base 3, 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, and also an emirpimes, since its reverse is a distinct semiprime: 50410421 = 359 ⋅140419.

It can be written as a sum of positive squares in 2 ways, for example, as 3171961 + 9229444 = 1781^2 + 3038^2 .

It is not a de Polignac number, because 12401405 - 2⁸ = 12401149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1240136 + ... + 1240145.

It is an arithmetic number, because the mean of its divisors is an integer number (3720423).

Almost surely, 2^12401405 is an apocalyptic number.

It is an amenable number.

12401405 is a deficient number, since it is larger than the sum of its proper divisors (2480287).

12401405 is an equidigital number, since it uses as much as digits as its factorization.

12401405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480286.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 12401405 is about 3521.5628632753. The cubic root of 12401405 is about 231.4676470515.

Adding to 12401405 its reverse (50410421), we get a palindrome (62811826).

The spelling of 12401405 in words is "twelve million, four hundred one thousand, four hundred five".