4872421 has 4 divisors (see below), whose sum is σ = 5159052. Its totient is φ = 4585792.

The previous prime is 4872403. The next prime is 4872431. The reversal of 4872421 is 1242784.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2873025 + 1999396 = 1695^2 + 1414^2 .

It is a cyclic number.

It is not a de Polignac number, because 4872421 - 2⁷ = 4872293 is a prime.

It is a Duffinian number.

4872421 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4872421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4872431) by changing a digit.

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, 143290 + ... + 143323.

It is an arithmetic number, because the mean of its divisors is an integer number (1289763).

Almost surely, 2^4872421 is an apocalyptic number.

It is an amenable number.

4872421 is a deficient number, since it is larger than the sum of its proper divisors (286631).

4872421 is a wasteful number, since it uses less digits than its factorization.

4872421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286630.

The product of its digits is 3584, while the sum is 28.

The square root of 4872421 is about 2207.3561108258. The cubic root of 4872421 is about 169.5306662463.

The spelling of 4872421 in words is "four million, eight hundred seventy-two thousand, four hundred twenty-one".