420521012 has 12 divisors (see below), whose sum is σ = 736055460. Its totient is φ = 210219456.

The previous prime is 420520987. The next prime is 420521047. The reversal of 420521012 is 210125024.

It can be written as a sum of positive squares in 2 ways, for example, as 412658596 + 7862416 = 20314^2 + 2804^2 .

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, 33914 + ... + 44622.

It is an arithmetic number, because the mean of its divisors is an integer number (61337955).

Almost surely, 2^420521012 is an apocalyptic number.

It is an amenable number.

420521012 is a deficient number, since it is larger than the sum of its proper divisors (315534448).

420521012 is a wasteful number, since it uses less digits than its factorization.

420521012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20530 (or 20528 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 420521012 is about 20506.6089834473. The cubic root of 420521012 is about 749.1967768245.

Adding to 420521012 its reverse (210125024), we get a palindrome (630646036).

The spelling of 420521012 in words is "four hundred twenty million, five hundred twenty-one thousand, twelve".