1604043 has 48 divisors (see below), whose sum is σ = 2935296. Its totient is φ = 855360.

The previous prime is 1604021. The next prime is 1604051. The reversal of 1604043 is 3404061.

1604043 is an esthetic number in base 12, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 1604043 - 2⁹ = 1603531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1604003) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39103 + ... + 39143.

It is an arithmetic number, because the mean of its divisors is an integer number (61152).

2^1604043 is an apocalyptic number.

1604043 is a deficient number, since it is larger than the sum of its proper divisors (1331253).

1604043 is an equidigital number, since it uses as much as digits as its factorization.

1604043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1604043 is about 1266.5081918409. The cubic root of 1604043 is about 117.0591416974.

Adding to 1604043 its sum of digits (18), we get a palindrome (1604061).

The spelling of 1604043 in words is "one million, six hundred four thousand, forty-three".