86412505 has 4 divisors (see below), whose sum is σ = 103695012. Its totient is φ = 69130000.

The previous prime is 86412497. The next prime is 86412517. The reversal of 86412505 is 50521468.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40755456 + 45657049 = 6384^2 + 6757^2 .

It is not a de Polignac number, because 86412505 - 2³ = 86412497 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8641246 + ... + 8641255.

It is an arithmetic number, because the mean of its divisors is an integer number (25923753).

Almost surely, 2^86412505 is an apocalyptic number.

It is an amenable number.

86412505 is a deficient number, since it is larger than the sum of its proper divisors (17282507).

86412505 is a wasteful number, since it uses less digits than its factorization.

86412505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17282506.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 86412505 is about 9295.8326684596. The cubic root of 86412505 is about 442.1051069625.

The spelling of 86412505 in words is "eighty-six million, four hundred twelve thousand, five hundred five".