420105512 has 16 divisors (see below), whose sum is σ = 787952340. Its totient is φ = 209984896.

The previous prime is 420105487. The next prime is 420105527. The reversal of 420105512 is 215501024.

It can be written as a sum of positive squares in 2 ways, for example, as 407474596 + 12630916 = 20186^2 + 3554^2 .

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 3 ways as a sum of consecutive naturals, for example, 26138 + ... + 39030.

Almost surely, 2^420105512 is an apocalyptic number.

It is an amenable number.

420105512 is a deficient number, since it is larger than the sum of its proper divisors (367846828).

420105512 is a wasteful number, since it uses less digits than its factorization.

420105512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16972 (or 16968 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 420105512 is about 20496.4755994781. The cubic root of 420105512 is about 748.9499450508.

Adding to 420105512 its reverse (215501024), we get a palindrome (635606536).

The spelling of 420105512 in words is "four hundred twenty million, one hundred five thousand, five hundred twelve".