1340442 has 32 divisors (see below), whose sum is σ = 3020160. Its totient is φ = 440640.

The previous prime is 1340441. The next prime is 1340447. The reversal of 1340442 is 2440431.

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

It is not an unprimeable number, because it can be changed into a prime (1340441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5442 + ... + 5682.

It is an arithmetic number, because the mean of its divisors is an integer number (94380).

2^1340442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1340442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1510080).

1340442 is an abundant number, since it is smaller than the sum of its proper divisors (1679718).

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

1340442 is a wasteful number, since it uses less digits than its factorization.

1340442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355 (or 349 counting only the distinct ones).

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

The square root of 1340442 is about 1157.7745894603. The cubic root of 1340442 is about 110.2594975390.

Adding to 1340442 its reverse (2440431), we get a palindrome (3780873).

The spelling of 1340442 in words is "one million, three hundred forty thousand, four hundred forty-two".