420563471 has 4 divisors (see below), whose sum is σ = 420685200. Its totient is φ = 420441744.

The previous prime is 420563467. The next prime is 420563501. The reversal of 420563471 is 174365024.

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

It is a cyclic number.

It is not a de Polignac number, because 420563471 - 2² = 420563467 is a prime.

It is a super-3 number, since 3×420563471³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420563401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55526 + ... + 62643.

It is an arithmetic number, because the mean of its divisors is an integer number (105171300).

Almost surely, 2^420563471 is an apocalyptic number.

420563471 is a deficient number, since it is larger than the sum of its proper divisors (121729).

420563471 is a wasteful number, since it uses less digits than its factorization.

420563471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121728.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 420563471 is about 20507.6442089285. The cubic root of 420563471 is about 749.2219908444.

It can be divided in two parts, 4205 and 63471, that added together give a palindrome (67676).

The spelling of 420563471 in words is "four hundred twenty million, five hundred sixty-three thousand, four hundred seventy-one".