1405424 has 20 divisors (see below), whose sum is σ = 2883744. Its totient is φ = 661248.

The previous prime is 1405421. The next prime is 1405451. The reversal of 1405424 is 4245041.

It is a junction number, because it is equal to n+sod(n) for n = 1405396 and 1405405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405421) 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, 2312 + ... + 2855.

2^1405424 is an apocalyptic number.

It is an amenable number.

1405424 is an abundant number, since it is smaller than the sum of its proper divisors (1478320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1405424 is a wasteful number, since it uses less digits than its factorization.

1405424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5192 (or 5186 counting only the distinct ones).

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

The square root of 1405424 is about 1185.5057992266. The cubic root of 1405424 is about 112.0131787213.

The spelling of 1405424 in words is "one million, four hundred five thousand, four hundred twenty-four".