1323240 has 32 divisors (see below), whose sum is σ = 3970080. Its totient is φ = 352832.

The previous prime is 1323233. The next prime is 1323247. The reversal of 1323240 is 423231.

It is an interprime number because it is at equal distance from previous prime (1323233) and next prime (1323247).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1323247) 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, 5394 + ... + 5633.

It is an arithmetic number, because the mean of its divisors is an integer number (124065).

2^1323240 is an apocalyptic number.

1323240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323240 is an abundant number, since it is smaller than the sum of its proper divisors (2646840).

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

1323240 is a wasteful number, since it uses less digits than its factorization.

1323240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11041 (or 11037 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 1323240 is about 1150.3216941360. The cubic root of 1323240 is about 109.7858090956.

Adding to 1323240 its reverse (423231), we get a palindrome (1746471).

Subtracting from 1323240 its reverse (423231), we obtain a palindrome (900009).

The spelling of 1323240 in words is "one million, three hundred twenty-three thousand, two hundred forty".