8072861 has 4 divisors (see below), whose sum is σ = 8244672. Its totient is φ = 7901052.

The previous prime is 8072843. The next prime is 8072881. The reversal of 8072861 is 1682708.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8072861 - 2⁶ = 8072797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8072821) 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, 85835 + ... + 85928.

It is an arithmetic number, because the mean of its divisors is an integer number (2061168).

Almost surely, 2^8072861 is an apocalyptic number.

It is an amenable number.

8072861 is a deficient number, since it is larger than the sum of its proper divisors (171811).

8072861 is a wasteful number, since it uses less digits than its factorization.

8072861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171810.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 8072861 is about 2841.2780574945. The cubic root of 8072861 is about 200.6053409631.

The spelling of 8072861 in words is "eight million, seventy-two thousand, eight hundred sixty-one".