1340224 has 28 divisors (see below), whose sum is σ = 2726944. Its totient is φ = 653184.

The previous prime is 1340221. The next prime is 1340237. The reversal of 1340224 is 4220431.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1340198 and 1340207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2509 + ... + 2995.

2^1340224 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 1340224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1363472).

1340224 is an abundant number, since it is smaller than the sum of its proper divisors (1386720).

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

1340224 is an equidigital number, since it uses as much as digits as its factorization.

1340224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542 (or 532 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1340224 is about 1157.6804394996. The cubic root of 1340224 is about 110.2535199401.

Adding to 1340224 its reverse (4220431), we get a palindrome (5560655).

The spelling of 1340224 in words is "one million, three hundred forty thousand, two hundred twenty-four".