420534405 has 12 divisors (see below), whose sum is σ = 728926380. Its totient is φ = 224284992.

The previous prime is 420534397. The next prime is 420534463. The reversal of 420534405 is 504435024.

It can be written as a sum of positive squares in 2 ways, for example, as 173132964 + 247401441 = 13158^2 + 15729^2 .

It is not a de Polignac number, because 420534405 - 2³ = 420534397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4672560 + ... + 4672649.

It is an arithmetic number, because the mean of its divisors is an integer number (60743865).

Almost surely, 2^420534405 is an apocalyptic number.

420534405 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

420534405 is a deficient number, since it is larger than the sum of its proper divisors (308391975).

420534405 is a wasteful number, since it uses less digits than its factorization.

420534405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9345220 (or 9345217 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 420534405 is about 20506.9355341065. The cubic root of 420534405 is about 749.2047303597.

Adding to 420534405 its reverse (504435024), we get a palindrome (924969429).

The spelling of 420534405 in words is "four hundred twenty million, five hundred thirty-four thousand, four hundred five".