605435021 has 2 divisors, whose sum is σ = 605435022. Its totient is φ = 605435020.

The previous prime is 605435011. The next prime is 605435023. The reversal of 605435021 is 120534506.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 345774025 + 259660996 = 18595^2 + 16114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-605435021 is a prime.

Together with 605435023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (605435023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302717510 + 302717511.

It is an arithmetic number, because the mean of its divisors is an integer number (302717511).

Almost surely, 2^605435021 is an apocalyptic number.

It is an amenable number.

605435021 is a deficient number, since it is larger than the sum of its proper divisors (1).

605435021 is an equidigital number, since it uses as much as digits as its factorization.

605435021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 605435021 is about 24605.5892227762. The cubic root of 605435021 is about 845.9717220101.

Adding to 605435021 its reverse (120534506), we get a palindrome (725969527).

The spelling of 605435021 in words is "six hundred five million, four hundred thirty-five thousand, twenty-one".