420554545 has 4 divisors (see below), whose sum is σ = 504665460. Its totient is φ = 336443632.

The previous prime is 420554521. The next prime is 420554567. The reversal of 420554545 is 545455024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59706529 + 360848016 = 7727^2 + 18996^2 .

It is a cyclic number.

It is not a de Polignac number, because 420554545 - 2¹¹ = 420552497 is a prime.

It is a super-2 number, since 2×420554545² = 353732250640314050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 420554545.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42055450 + ... + 42055459.

It is an arithmetic number, because the mean of its divisors is an integer number (126166365).

Almost surely, 2^420554545 is an apocalyptic number.

It is an amenable number.

420554545 is a deficient number, since it is larger than the sum of its proper divisors (84110915).

420554545 is an equidigital number, since it uses as much as digits as its factorization.

420554545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84110914.

The product of its (nonzero) digits is 80000, while the sum is 34.

The square root of 420554545 is about 20507.4265816070. The cubic root of 420554545 is about 749.2166903342.

The spelling of 420554545 in words is "four hundred twenty million, five hundred fifty-four thousand, five hundred forty-five".