420230641 has 2 divisors, whose sum is σ = 420230642. Its totient is φ = 420230640.

The previous prime is 420230639. The next prime is 420230653. The reversal of 420230641 is 146032024.

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., 405821025 + 14409616 = 20145^2 + 3796^2 .

It is a cyclic number.

It is not a de Polignac number, because 420230641 - 2¹ = 420230639 is a prime.

Together with 420230639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (420230621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210115320 + 210115321.

It is an arithmetic number, because the mean of its divisors is an integer number (210115321).

Almost surely, 2^420230641 is an apocalyptic number.

It is an amenable number.

420230641 is a deficient number, since it is larger than the sum of its proper divisors (1).

420230641 is an equidigital number, since it uses as much as digits as its factorization.

420230641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 420230641 is about 20499.5278238305. The cubic root of 420230641 is about 749.0242962571.

Adding to 420230641 its reverse (146032024), we get a palindrome (566262665).

It can be divided in two parts, 4202 and 30641, that added together give a palindrome (34843).

The spelling of 420230641 in words is "four hundred twenty million, two hundred thirty thousand, six hundred forty-one".