8421700 has 72 divisors (see below), whose sum is σ = 21373632. Its totient is φ = 2820480.

The previous prime is 8421697. The next prime is 8421701. The reversal of 8421700 is 71248.

It is not an unprimeable number, because it can be changed into a prime (8421701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36987 + ... + 37213.

It is an arithmetic number, because the mean of its divisors is an integer number (296856).

Almost surely, 2^8421700 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8421700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10686816).

8421700 is an abundant number, since it is smaller than the sum of its proper divisors (12951932).

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

8421700 is a wasteful number, since it uses less digits than its factorization.

8421700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 8421700 is about 2902.0165402699. The cubic root of 8421700 is about 203.4541668841.

Adding to 8421700 its reverse (71248), we get a palindrome (8492948).

The spelling of 8421700 in words is "eight million, four hundred twenty-one thousand, seven hundred".