420213573 has 12 divisors (see below), whose sum is σ = 653665740. Its totient is φ = 258592896.

The previous prime is 420213569. The next prime is 420213581. The reversal of 420213573 is 375312024.

It can be written as a sum of positive squares in 2 ways, for example, as 206410689 + 213802884 = 14367^2 + 14622^2 .

It is not a de Polignac number, because 420213573 - 2² = 420213569 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420213533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1795668 + ... + 1795901.

It is an arithmetic number, because the mean of its divisors is an integer number (54472145).

Almost surely, 2^420213573 is an apocalyptic number.

It is an amenable number.

420213573 is a deficient number, since it is larger than the sum of its proper divisors (233452167).

420213573 is a wasteful number, since it uses less digits than its factorization.

420213573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3591588 (or 3591585 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 420213573 is about 20499.1115173317. Note that the first 3 decimals coincide. The cubic root of 420213573 is about 749.0141553816.

Adding to 420213573 its reverse (375312024), we get a palindrome (795525597).

The spelling of 420213573 in words is "four hundred twenty million, two hundred thirteen thousand, five hundred seventy-three".