1440342 has 40 divisors (see below), whose sum is σ = 3423816. Its totient is φ = 451008.

The previous prime is 1440317. The next prime is 1440349. The reversal of 1440342 is 2430441.

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 (1440349) 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 19 ways as a sum of consecutive naturals, for example, 2493 + ... + 3015.

2^1440342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1440342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1711908).

1440342 is an abundant number, since it is smaller than the sum of its proper divisors (1983474).

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

1440342 is a wasteful number, since it uses less digits than its factorization.

1440342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 545 counting only the distinct ones).

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

The square root of 1440342 is about 1200.1424915401. The cubic root of 1440342 is about 112.9332626004.

Adding to 1440342 its reverse (2430441), we get a palindrome (3870783).

Subtracting 1440342 from its reverse (2430441), we obtain a palindrome (990099).

The spelling of 1440342 in words is "one million, four hundred forty thousand, three hundred forty-two".