4872856421 has 8 divisors (see below), whose sum is σ = 5182029720. Its totient is φ = 4566187008.

The previous prime is 4872856409. The next prime is 4872856423. The reversal of 4872856421 is 1246582784.

It can be written as a sum of positive squares in 4 ways, for example, as 3957793921 + 915062500 = 62911^2 + 30250^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4872856421 - 2³⁰ = 3799114597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4872856423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621956 + ... + 629741.

It is an arithmetic number, because the mean of its divisors is an integer number (647753715).

Almost surely, 2^4872856421 is an apocalyptic number.

It is an amenable number.

4872856421 is a deficient number, since it is larger than the sum of its proper divisors (309173299).

4872856421 is a wasteful number, since it uses less digits than its factorization.

4872856421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251943.

The product of its digits is 860160, while the sum is 47.

The square root of 4872856421 is about 69805.8480429828. The cubic root of 4872856421 is about 1695.3571609821.

The spelling of 4872856421 in words is "four billion, eight hundred seventy-two million, eight hundred fifty-six thousand, four hundred twenty-one".