420030665 has 16 divisors (see below), whose sum is σ = 516762048. Its totient is φ = 327571776.

The previous prime is 420030659. The next prime is 420030673. The reversal of 420030665 is 566030024.

It is a cyclic number.

It is not a de Polignac number, because 420030665 - 2⁴ = 420030649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130202 + ... + 133388.

It is an arithmetic number, because the mean of its divisors is an integer number (32297628).

Almost surely, 2^420030665 is an apocalyptic number.

It is an amenable number.

420030665 is a deficient number, since it is larger than the sum of its proper divisors (96731383).

420030665 is a wasteful number, since it uses less digits than its factorization.

420030665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3848.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 420030665 is about 20494.6496676572. The cubic root of 420030665 is about 748.9054641729.

Adding to 420030665 its reverse (566030024), we get a palindrome (986060689).

The spelling of 420030665 in words is "four hundred twenty million, thirty thousand, six hundred sixty-five".