1213040 has 40 divisors (see below), whose sum is σ = 2879280. Its totient is φ = 475136.

The previous prime is 1213033. The next prime is 1213049. The reversal of 1213040 is 403121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4592 + ... + 4848.

It is an arithmetic number, because the mean of its divisors is an integer number (71982).

2^1213040 is an apocalyptic number.

1213040 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 1213040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1439640).

1213040 is an abundant number, since it is smaller than the sum of its proper divisors (1666240).

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

1213040 is a wasteful number, since it uses less digits than its factorization.

1213040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1213040 is about 1101.3809513515. The cubic root of 1213040 is about 106.6493895628.

Adding to 1213040 its reverse (403121), we get a palindrome (1616161).

The spelling of 1213040 in words is "one million, two hundred thirteen thousand, forty".