1424405 has 4 divisors (see below), whose sum is σ = 1709292. Its totient is φ = 1139520.

The previous prime is 1424399. The next prime is 1424407. The reversal of 1424405 is 5044241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5044241 = 1823 ⋅2767.

It can be written as a sum of positive squares in 2 ways, for example, as 552049 + 872356 = 743^2 + 934^2 .

It is not a de Polignac number, because 1424405 - 2⁶ = 1424341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1424407) 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, 142436 + ... + 142445.

It is an arithmetic number, because the mean of its divisors is an integer number (427323).

2^1424405 is an apocalyptic number.

It is an amenable number.

1424405 is a deficient number, since it is larger than the sum of its proper divisors (284887).

1424405 is an equidigital number, since it uses as much as digits as its factorization.

1424405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284886.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1424405 is about 1193.4843945356. The cubic root of 1424405 is about 112.5151913642.

Adding to 1424405 its reverse (5044241), we get a palindrome (6468646).

The spelling of 1424405 in words is "one million, four hundred twenty-four thousand, four hundred five".