8421513 has 8 divisors (see below), whose sum is σ = 11616000. Its totient is φ = 5420688.

The previous prime is 8421509. The next prime is 8421529. The reversal of 8421513 is 3151248.

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

It is not a de Polignac number, because 8421513 - 2² = 8421509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8421563) 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 7 ways as a sum of consecutive naturals, for example, 48313 + ... + 48486.

It is an arithmetic number, because the mean of its divisors is an integer number (1452000).

Almost surely, 2^8421513 is an apocalyptic number.

It is an amenable number.

8421513 is a deficient number, since it is larger than the sum of its proper divisors (3194487).

8421513 is a wasteful number, since it uses less digits than its factorization.

8421513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96831.

The product of its digits is 960, while the sum is 24.

The square root of 8421513 is about 2901.9843211155. The cubic root of 8421513 is about 203.4526610040.

The spelling of 8421513 in words is "eight million, four hundred twenty-one thousand, five hundred thirteen".