1604021043 has 16 divisors (see below), whose sum is σ = 2295526176. Its totient is φ = 992655360.

The previous prime is 1604021011. The next prime is 1604021051. The reversal of 1604021043 is 3401204061.

It is not a de Polignac number, because 1604021043 - 2⁵ = 1604021011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1604021143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211698 + ... + 219143.

It is an arithmetic number, because the mean of its divisors is an integer number (143470386).

Almost surely, 2^1604021043 is an apocalyptic number.

1604021043 is a deficient number, since it is larger than the sum of its proper divisors (691505133).

1604021043 is a wasteful number, since it uses less digits than its factorization.

1604021043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430934.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1604021043 is about 40050.2314974583. The cubic root of 1604021043 is about 1170.5860757219.

The spelling of 1604021043 in words is "one billion, six hundred four million, twenty-one thousand, forty-three".