435424021 has 2 divisors, whose sum is σ = 435424022. Its totient is φ = 435424020.

The previous prime is 435424013. The next prime is 435424069. The reversal of 435424021 is 120424534.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 433888900 + 1535121 = 20830^2 + 1239^2 .

It is a cyclic number.

It is not a de Polignac number, because 435424021 - 2³ = 435424013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (435424001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217712010 + 217712011.

It is an arithmetic number, because the mean of its divisors is an integer number (217712011).

Almost surely, 2^435424021 is an apocalyptic number.

It is an amenable number.

435424021 is a deficient number, since it is larger than the sum of its proper divisors (1).

435424021 is an equidigital number, since it uses as much as digits as its factorization.

435424021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 435424021 is about 20866.8162641070. The cubic root of 435424021 is about 757.9445968422.

Adding to 435424021 its reverse (120424534), we get a palindrome (555848555).

The spelling of 435424021 in words is "four hundred thirty-five million, four hundred twenty-four thousand, twenty-one".