1243404 has 48 divisors (see below), whose sum is σ = 3343200. Its totient is φ = 399168.

The previous prime is 1243393. The next prime is 1243421. The reversal of 1243404 is 4043421.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2934 + ... + 3330.

It is an arithmetic number, because the mean of its divisors is an integer number (69650).

2^1243404 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 1243404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1671600).

1243404 is an abundant number, since it is smaller than the sum of its proper divisors (2099796).

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

1243404 is a wasteful number, since it uses less digits than its factorization.

1243404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1243404 is about 1115.0802661692. The cubic root of 1243404 is about 107.5319248971.

Adding to 1243404 its reverse (4043421), we get a palindrome (5286825).

The spelling of 1243404 in words is "one million, two hundred forty-three thousand, four hundred four".