8421499 has 4 divisors (see below), whose sum is σ = 8536936. Its totient is φ = 8306064.

The previous prime is 8421493. The next prime is 8421509. The reversal of 8421499 is 9941248.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 8421499 - 2¹⁷ = 8290427 is a prime.

It is a d-powerful number, because it can be written as 8⁵ + 4² + 2²³ + 1 + 4² + 9 + 9² .

It is a Duffinian number.

8421499 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8421493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57609 + ... + 57754.

It is an arithmetic number, because the mean of its divisors is an integer number (2134234).

Almost surely, 2^8421499 is an apocalyptic number.

8421499 is a deficient number, since it is larger than the sum of its proper divisors (115437).

8421499 is a wasteful number, since it uses less digits than its factorization.

8421499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115436.

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

The square root of 8421499 is about 2901.9819089719. The cubic root of 8421499 is about 203.4525482634.

The spelling of 8421499 in words is "eight million, four hundred twenty-one thousand, four hundred ninety-nine".