4897821 has 8 divisors (see below), whose sum is σ = 6598144. Its totient is φ = 3231360.

The previous prime is 4897811. The next prime is 4897831. The reversal of 4897821 is 1287984.

4897821 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (4897811) and next prime (4897831).

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

It is not a de Polignac number, because 4897821 - 2⁶ = 4897757 is a prime.

It is a Duffinian number.

4897821 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4897821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4897811) 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, 8125 + ... + 8706.

It is an arithmetic number, because the mean of its divisors is an integer number (824768).

Almost surely, 2^4897821 is an apocalyptic number.

It is an amenable number.

4897821 is a deficient number, since it is larger than the sum of its proper divisors (1700323).

4897821 is a wasteful number, since it uses less digits than its factorization.

4897821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16931.

The product of its digits is 32256, while the sum is 39.

The square root of 4897821 is about 2213.1021214576. The cubic root of 4897821 is about 169.8247444173.

The spelling of 4897821 in words is "four million, eight hundred ninety-seven thousand, eight hundred twenty-one".