1340144 has 40 divisors (see below), whose sum is σ = 2968560. Its totient is φ = 580608.

The previous prime is 1340113. The next prime is 1340149. The reversal of 1340144 is 4410431.

1340144 = T₁₄₅ + T₁₄₆ + ... + T₂₂₂.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3347 + ... + 3725.

It is an arithmetic number, because the mean of its divisors is an integer number (74214).

2^1340144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1340144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1484280).

1340144 is an abundant number, since it is smaller than the sum of its proper divisors (1628416).

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

1340144 is a wasteful number, since it uses less digits than its factorization.

1340144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 411 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1340144 is about 1157.6458871347. The cubic root of 1340144 is about 110.2513261633.

Adding to 1340144 its reverse (4410431), we get a palindrome (5750575).

The spelling of 1340144 in words is "one million, three hundred forty thousand, one hundred forty-four".