8499421 has 8 divisors (see below), whose sum is σ = 9731520. Its totient is φ = 7271808.

The previous prime is 8499409. The next prime is 8499461. The reversal of 8499421 is 1249948.

It is a happy number.

8499421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8499421 - 2⁵ = 8499389 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 (8499461) 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 7 ways as a sum of consecutive naturals, for example, 5850 + ... + 7156.

It is an arithmetic number, because the mean of its divisors is an integer number (1216440).

Almost surely, 2^8499421 is an apocalyptic number.

It is an amenable number.

8499421 is a deficient number, since it is larger than the sum of its proper divisors (1232099).

8499421 is a wasteful number, since it uses less digits than its factorization.

8499421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2243.

The product of its digits is 20736, while the sum is 37.

The square root of 8499421 is about 2915.3766480508. The cubic root of 8499421 is about 204.0781211116.

The spelling of 8499421 in words is "eight million, four hundred ninety-nine thousand, four hundred twenty-one".