1604741 has 6 divisors (see below), whose sum is σ = 1635942. Its totient is φ = 1574120.

The previous prime is 1604737. The next prime is 1604747. The reversal of 1604741 is 1474061.

It can be written as a sum of positive squares in only one way, i.e., 1256641 + 348100 = 1121^2 + 590^2 .

It is not a de Polignac number, because 1604741 - 2² = 1604737 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604747) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3251 + ... + 3711.

It is an arithmetic number, because the mean of its divisors is an integer number (272657).

2^1604741 is an apocalyptic number.

It is an amenable number.

1604741 is a deficient number, since it is larger than the sum of its proper divisors (31201).

1604741 is an frugal number, since it uses more digits than its factorization.

1604741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579 (or 520 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1604741 is about 1266.7837226614. The cubic root of 1604741 is about 117.0761186804.

The spelling of 1604741 in words is "one million, six hundred four thousand, seven hundred forty-one".