420404005 has 32 divisors (see below), whose sum is σ = 603684864. Its totient is φ = 274798656.

The previous prime is 420403979. The next prime is 420404011. The reversal of 420404005 is 500404024.

420404005 is nontrivially palindromic in base 6.

It is a cyclic number.

It is not a de Polignac number, because 420404005 - 2⁷ = 420403877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 294724 + ... + 296146.

It is an arithmetic number, because the mean of its divisors is an integer number (18865152).

Almost surely, 2^420404005 is an apocalyptic number.

It is an amenable number.

420404005 is a deficient number, since it is larger than the sum of its proper divisors (183280859).

420404005 is a wasteful number, since it uses less digits than its factorization.

420404005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 420404005 is about 20503.7558754488. The cubic root of 420404005 is about 749.1272841425.

Adding to 420404005 its sum of digits (19), we get a palindrome (420404024).

Adding to 420404005 its reverse (500404024), we get a palindrome (920808029).

The spelling of 420404005 in words is "four hundred twenty million, four hundred four thousand, five".