86421515 has 8 divisors (see below), whose sum is σ = 103966848. Its totient is φ = 68963200.

The previous prime is 86421493. The next prime is 86421539. The reversal of 86421515 is 51512468.

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

It is not a de Polignac number, because 86421515 - 2⁶ = 86421451 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 19547 + ... + 23556.

It is an arithmetic number, because the mean of its divisors is an integer number (12995856).

Almost surely, 2^86421515 is an apocalyptic number.

86421515 is a deficient number, since it is larger than the sum of its proper divisors (17545333).

86421515 is a wasteful number, since it uses less digits than its factorization.

86421515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43509.

The product of its digits is 9600, while the sum is 32.

The square root of 86421515 is about 9296.3172815906. The cubic root of 86421515 is about 442.1204721329.

The spelling of 86421515 in words is "eighty-six million, four hundred twenty-one thousand, five hundred fifteen".