420043305 has 32 divisors (see below), whose sum is σ = 734469120. Its totient is φ = 203295680.

The previous prime is 420043291. The next prime is 420043331. The reversal of 420043305 is 503340024.

It is a happy number.

It is not a de Polignac number, because 420043305 - 2⁷ = 420043177 is a prime.

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, 106804 + ... + 110666.

It is an arithmetic number, because the mean of its divisors is an integer number (22952160).

Almost surely, 2^420043305 is an apocalyptic number.

It is an amenable number.

420043305 is a deficient number, since it is larger than the sum of its proper divisors (314425815).

420043305 is a wasteful number, since it uses less digits than its factorization.

420043305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4541.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 420043305 is about 20494.9580385030. The cubic root of 420043305 is about 748.9129763785.

Adding to 420043305 its reverse (503340024), we get a palindrome (923383329).

The spelling of 420043305 in words is "four hundred twenty million, forty-three thousand, three hundred five".