1243340 has 48 divisors (see below), whose sum is σ = 3048192. Its totient is φ = 417216.

The previous prime is 1243337. The next prime is 1243343. The reversal of 1243340 is 433421.

1243340 = T₅₇ + T₅₈ + ... + T₁₉₆.

It is an interprime number because it is at equal distance from previous prime (1243337) and next prime (1243343).

It is not an unprimeable number, because it can be changed into a prime (1243343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11567 + ... + 11673.

It is an arithmetic number, because the mean of its divisors is an integer number (63504).

2^1243340 is an apocalyptic number.

1243340 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 1243340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1524096).

1243340 is an abundant number, since it is smaller than the sum of its proper divisors (1804852).

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

1243340 is a wasteful number, since it uses less digits than its factorization.

1243340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 1243340 is about 1115.0515683142. The cubic root of 1243340 is about 107.5300799185.

Adding to 1243340 its reverse (433421), we get a palindrome (1676761).

The spelling of 1243340 in words is "one million, two hundred forty-three thousand, three hundred forty".