1404490 has 8 divisors (see below), whose sum is σ = 2528100. Its totient is φ = 561792.

The previous prime is 1404479. The next prime is 1404497. The reversal of 1404490 is 944041.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1375929 + 28561 = 1173^2 + 169^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1404497) 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 3 ways as a sum of consecutive naturals, for example, 70215 + ... + 70234.

2^1404490 is an apocalyptic number.

1404490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1404490 is a deficient number, since it is larger than the sum of its proper divisors (1123610).

1404490 is a wasteful number, since it uses less digits than its factorization.

1404490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140456.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1404490 is about 1185.1118090712. Note that the first 3 decimals coincide. The cubic root of 1404490 is about 111.9883597597.

The spelling of 1404490 in words is "one million, four hundred four thousand, four hundred ninety".