1604441 has 2 divisors, whose sum is σ = 1604442. Its totient is φ = 1604440.

The previous prime is 1604437. The next prime is 1604461. The reversal of 1604441 is 1444061.

It is a happy number.

It is an a-pointer prime, because the next prime (1604461) can be obtained adding 1604441 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1201216 + 403225 = 1096^2 + 635^2 .

It is a cyclic number.

It is not a de Polignac number, because 1604441 - 2² = 1604437 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1604461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802220 + 802221.

It is an arithmetic number, because the mean of its divisors is an integer number (802221).

2^1604441 is an apocalyptic number.

It is an amenable number.

1604441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604441 is an equidigital number, since it uses as much as digits as its factorization.

1604441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1604441 is about 1266.6653070168. The cubic root of 1604441 is about 117.0688225862.

The spelling of 1604441 in words is "one million, six hundred four thousand, four hundred forty-one".