1224340 has 48 divisors (see below), whose sum is σ = 2942352. Its totient is φ = 423936.

The previous prime is 1224337. The next prime is 1224347. The reversal of 1224340 is 434221.

It can be written as a sum of positive squares in 8 ways, for example, as 104976 + 1119364 = 324^2 + 1058^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224347) 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, 4282 + ... + 4558.

It is an arithmetic number, because the mean of its divisors is an integer number (61299).

2^1224340 is an apocalyptic number.

1224340 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 1224340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1471176).

1224340 is an abundant number, since it is smaller than the sum of its proper divisors (1718012).

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

1224340 is a wasteful number, since it uses less digits than its factorization.

1224340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 314 counting only the distinct ones).

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

The square root of 1224340 is about 1106.4989832801. The cubic root of 1224340 is about 106.9795285027.

Adding to 1224340 its reverse (434221), we get a palindrome (1658561).

The spelling of 1224340 in words is "one million, two hundred twenty-four thousand, three hundred forty".