1240404 has 24 divisors (see below), whose sum is σ = 3157728. Its totient is φ = 375840.

The previous prime is 1240399. The next prime is 1240423. The reversal of 1240404 is 4040421.

1240404 is a modest number, since divided by 404 gives 124 as remainder.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4567 + ... + 4830.

It is an arithmetic number, because the mean of its divisors is an integer number (131572).

2^1240404 is an apocalyptic number.

It is an amenable number.

1240404 is an abundant number, since it is smaller than the sum of its proper divisors (1917324).

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

1240404 is a wasteful number, since it uses less digits than its factorization.

1240404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9415 (or 9413 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 1240404 is about 1113.7342591480. The cubic root of 1240404 is about 107.4453733636.

Adding to 1240404 its reverse (4040421), we get a palindrome (5280825).

The spelling of 1240404 in words is "one million, two hundred forty thousand, four hundred four".