1604413 has 2 divisors, whose sum is σ = 1604414. Its totient is φ = 1604412.

The previous prime is 1604399. The next prime is 1604419. The reversal of 1604413 is 3144061.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1375929 + 228484 = 1173^2 + 478^2 .

It is a cyclic number.

It is not a de Polignac number, because 1604413 - 2⁵ = 1604381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1604419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802206 + 802207.

It is an arithmetic number, because the mean of its divisors is an integer number (802207).

2^1604413 is an apocalyptic number.

It is an amenable number.

1604413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604413 is an equidigital number, since it uses as much as digits as its factorization.

1604413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1604413 is about 1266.6542543251. The cubic root of 1604413 is about 117.0681415710.

Adding to 1604413 its reverse (3144061), we get a palindrome (4748474).

The spelling of 1604413 in words is "one million, six hundred four thousand, four hundred thirteen".