420532643 has 4 divisors (see below), whose sum is σ = 442665960. Its totient is φ = 398399328.

The previous prime is 420532627. The next prime is 420532649. The reversal of 420532643 is 346235024.

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 420532643 - 2⁴ = 420532627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420532649) 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, 11066630 + ... + 11066667.

It is an arithmetic number, because the mean of its divisors is an integer number (110666490).

Almost surely, 2^420532643 is an apocalyptic number.

420532643 is a deficient number, since it is larger than the sum of its proper divisors (22133317).

420532643 is a wasteful number, since it uses less digits than its factorization.

420532643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22133316.

The product of its (nonzero) digits is 17280, while the sum is 29.

The square root of 420532643 is about 20506.8925729863. The cubic root of 420532643 is about 749.2036839922.

Adding to 420532643 its reverse (346235024), we get a palindrome (766767667).

The spelling of 420532643 in words is "four hundred twenty million, five hundred thirty-two thousand, six hundred forty-three".