8512091 has 4 divisors (see below), whose sum is σ = 9728112. Its totient is φ = 7296072.

The previous prime is 8512081. The next prime is 8512111. The reversal of 8512091 is 1902158.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1902158 = 2 ⋅951079.

It is a de Polignac number, because none of the positive numbers 2^k-8512091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8512091.

It is not an unprimeable number, because it can be changed into a prime (8512081) 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 3 ways as a sum of consecutive naturals, for example, 608000 + ... + 608013.

It is an arithmetic number, because the mean of its divisors is an integer number (2432028).

Almost surely, 2^8512091 is an apocalyptic number.

8512091 is a deficient number, since it is larger than the sum of its proper divisors (1216021).

8512091 is a wasteful number, since it uses less digits than its factorization.

8512091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216020.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 8512091 is about 2917.5487999346. The cubic root of 8512091 is about 204.1794764881.

It can be divided in two parts, 851 and 2091, that multiplied together give a triangular number (1779441 = T₁₈₈₆).

The spelling of 8512091 in words is "eight million, five hundred twelve thousand, ninety-one".