1424385 has 20 divisors (see below), whose sum is σ = 2554068. Its totient is φ = 759456.

The previous prime is 1424369. The next prime is 1424399. The reversal of 1424385 is 5834241.

It can be written as a sum of positive squares in 2 ways, for example, as 1016064 + 408321 = 1008^2 + 639^2 .

It is not a de Polignac number, because 1424385 - 2⁴ = 1424369 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1354 + ... + 2163.

2^1424385 is an apocalyptic number.

1424385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1424385 is a deficient number, since it is larger than the sum of its proper divisors (1129683).

1424385 is an equidigital number, since it uses as much as digits as its factorization.

1424385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3534 (or 3525 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 1424385 is about 1193.4760156786. The cubic root of 1424385 is about 112.5146647550.

The spelling of 1424385 in words is "one million, four hundred twenty-four thousand, three hundred eighty-five".