420541305 has 16 divisors (see below), whose sum is σ = 689278464. Its totient is φ = 218817920.

The previous prime is 420541283. The next prime is 420541313. The reversal of 420541305 is 503145024.

It is not a de Polignac number, because 420541305 - 2⁶ = 420541241 is a prime.

It is a super-2 number, since 2×420541305² = 353709978422206050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 341289 + ... + 342518.

It is an arithmetic number, because the mean of its divisors is an integer number (43079904).

Almost surely, 2^420541305 is an apocalyptic number.

It is an amenable number.

420541305 is a deficient number, since it is larger than the sum of its proper divisors (268737159).

420541305 is a wasteful number, since it uses less digits than its factorization.

420541305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683856.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 420541305 is about 20507.1037691820. The cubic root of 420541305 is about 749.2088279113.

Adding to 420541305 its reverse (503145024), we get a palindrome (923686329).

The spelling of 420541305 in words is "four hundred twenty million, five hundred forty-one thousand, three hundred five".