8120555 has 4 divisors (see below), whose sum is σ = 9744672. Its totient is φ = 6496440.

The previous prime is 8120531. The next prime is 8120561. The reversal of 8120555 is 5550218.

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

It is not a de Polignac number, because 8120555 - 2⁶ = 8120491 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 812051 + ... + 812060.

It is an arithmetic number, because the mean of its divisors is an integer number (2436168).

Almost surely, 2^8120555 is an apocalyptic number.

8120555 is a deficient number, since it is larger than the sum of its proper divisors (1624117).

8120555 is a wasteful number, since it uses less digits than its factorization.

8120555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1624116.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 8120555 is about 2849.6587514999. The cubic root of 8120555 is about 200.9996204707. Note that the first 3 decimals are identical.

The spelling of 8120555 in words is "eight million, one hundred twenty thousand, five hundred fifty-five".