421287852672 has 48 divisors (see below), whose sum is σ = 1212299683530. Its totient is φ = 140429283840.

The previous prime is 421287852649. The next prime is 421287852673. The reversal of 421287852672 is 276258782124.

It is a happy number.

421287852672 is a `hidden beast` number, since 4 + 21 + 28 + 7 + 8 + 526 + 72 = 666.

It can be written as a sum of positive squares in only one way, i.e., 256951665216 + 164336187456 = 506904^2 + 405384^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (421287852673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 182849479 + ... + 182851782.

Almost surely, 2^421287852672 is an apocalyptic number.

It is an amenable number.

421287852672 is an abundant number, since it is smaller than the sum of its proper divisors (791011830858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421287852672 is a wasteful number, since it uses less digits than its factorization.

421287852672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365701281 (or 365701266 counting only the distinct ones).

The product of its digits is 6021120, while the sum is 54.

The spelling of 421287852672 in words is "four hundred twenty-one billion, two hundred eighty-seven million, eight hundred fifty-two thousand, six hundred seventy-two".