1424340 has 72 divisors (see below), whose sum is σ = 4448808. Its totient is φ = 368640.

The previous prime is 1424323. The next prime is 1424341. The reversal of 1424340 is 434241.

1424340 = T₄₁ + T₄₂ + ... + T₂₀₄.

It can be written as a sum of positive squares in 4 ways, for example, as 12996 + 1411344 = 114^2 + 1188^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1424341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7284 + ... + 7476.

It is an arithmetic number, because the mean of its divisors is an integer number (61789).

2^1424340 is an apocalyptic number.

1424340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1424340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2224404).

1424340 is an abundant number, since it is smaller than the sum of its proper divisors (3024468).

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

1424340 is a wasteful number, since it uses less digits than its factorization.

1424340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1424340 is about 1193.4571630352. The cubic root of 1424340 is about 112.5134798662.

Adding to 1424340 its reverse (434241), we get a palindrome (1858581).

Subtracting from 1424340 its reverse (434241), we obtain a palindrome (990099).

It can be divided in two parts, 1424 and 340, that added together give a square (1764 = 42²).

The spelling of 1424340 in words is "one million, four hundred twenty-four thousand, three hundred forty".