604145021 has 2 divisors, whose sum is σ = 604145022. Its totient is φ = 604145020.

The previous prime is 604144967. The next prime is 604145041. The reversal of 604145021 is 120541406.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 472584121 + 131560900 = 21739^2 + 11470^2 .

It is a cyclic number.

It is not a de Polignac number, because 604145021 - 2²² = 599950717 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (604145041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302072510 + 302072511.

It is an arithmetic number, because the mean of its divisors is an integer number (302072511).

Almost surely, 2^604145021 is an apocalyptic number.

It is an amenable number.

604145021 is a deficient number, since it is larger than the sum of its proper divisors (1).

604145021 is an equidigital number, since it uses as much as digits as its factorization.

604145021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 604145021 is about 24579.3616882131. The cubic root of 604145021 is about 845.3704576397.

Adding to 604145021 its reverse (120541406), we get a palindrome (724686427).

The spelling of 604145021 in words is "six hundred four million, one hundred forty-five thousand, twenty-one".