420555405 has 32 divisors (see below), whose sum is σ = 710115840. Its totient is φ = 211947840.

The previous prime is 420555379. The next prime is 420555427. The reversal of 420555405 is 504555024.

It is not a de Polignac number, because 420555405 - 2⁷ = 420555277 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, 124590 + ... + 127920.

It is an arithmetic number, because the mean of its divisors is an integer number (22191120).

Almost surely, 2^420555405 is an apocalyptic number.

It is an amenable number.

420555405 is a deficient number, since it is larger than the sum of its proper divisors (289560435).

420555405 is a wasteful number, since it uses less digits than its factorization.

420555405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3801.

The product of its (nonzero) digits is 20000, while the sum is 30.

The square root of 420555405 is about 20507.4475496099. The cubic root of 420555405 is about 749.2172010297.

The spelling of 420555405 in words is "four hundred twenty million, five hundred fifty-five thousand, four hundred five".