420455045 has 4 divisors (see below), whose sum is σ = 504546060. Its totient is φ = 336364032.

The previous prime is 420455039. The next prime is 420455059. The reversal of 420455045 is 540554024.

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 314920516 + 105534529 = 17746^2 + 10273^2 .

It is a cyclic number.

It is not a de Polignac number, because 420455045 - 2⁴ = 420455029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420454999 and 420455017.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42045500 + ... + 42045509.

It is an arithmetic number, because the mean of its divisors is an integer number (126136515).

Almost surely, 2^420455045 is an apocalyptic number.

It is an amenable number.

420455045 is a deficient number, since it is larger than the sum of its proper divisors (84091015).

420455045 is an equidigital number, since it uses as much as digits as its factorization.

420455045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84091014.

The product of its (nonzero) digits is 16000, while the sum is 29.

The square root of 420455045 is about 20505.0004876859. Note that the first 3 decimals coincide. The cubic root of 420455045 is about 749.1575993543.

The spelling of 420455045 in words is "four hundred twenty million, four hundred fifty-five thousand, forty-five".