420743405 has 4 divisors (see below), whose sum is σ = 504892092. Its totient is φ = 336594720.

The previous prime is 420743371. The next prime is 420743437. The reversal of 420743405 is 504347024.

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 113337316 + 307406089 = 10646^2 + 17533^2 .

It is not a de Polignac number, because 420743405 - 2²⁰ = 419694829 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 42074336 + ... + 42074345.

It is an arithmetic number, because the mean of its divisors is an integer number (126223023).

Almost surely, 2^420743405 is an apocalyptic number.

It is an amenable number.

420743405 is a deficient number, since it is larger than the sum of its proper divisors (84148687).

420743405 is an equidigital number, since it uses as much as digits as its factorization.

420743405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84148686.

The product of its (nonzero) digits is 13440, while the sum is 29.

The square root of 420743405 is about 20512.0307380815. The cubic root of 420743405 is about 749.3288247294.

The spelling of 420743405 in words is "four hundred twenty million, seven hundred forty-three thousand, four hundred five".