1405604 has 6 divisors (see below), whose sum is σ = 2459814. Its totient is φ = 702800.

The previous prime is 1405597. The next prime is 1405631. The reversal of 1405604 is 4065041.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 996004 + 409600 = 998^2 + 640^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175697 + ... + 175704.

It is an arithmetic number, because the mean of its divisors is an integer number (409969).

2^1405604 is an apocalyptic number.

It is an amenable number.

1405604 is a deficient number, since it is larger than the sum of its proper divisors (1054210).

1405604 is a wasteful number, since it uses less digits than its factorization.

1405604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351405 (or 351403 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1405604 is about 1185.5817137591. The cubic root of 1405604 is about 112.0179605550.

The spelling of 1405604 in words is "one million, four hundred five thousand, six hundred four".