8125815 has 8 divisors (see below), whose sum is σ = 13001328. Its totient is φ = 4333760.

The previous prime is 8125811. The next prime is 8125823. The reversal of 8125815 is 5185218.

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

It is not a de Polignac number, because 8125815 - 2² = 8125811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8125811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270846 + ... + 270875.

It is an arithmetic number, because the mean of its divisors is an integer number (1625166).

Almost surely, 2^8125815 is an apocalyptic number.

8125815 is a deficient number, since it is larger than the sum of its proper divisors (4875513).

8125815 is a wasteful number, since it uses less digits than its factorization.

8125815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541729.

The product of its digits is 3200, while the sum is 30.

The square root of 8125815 is about 2850.5815196202. The cubic root of 8125815 is about 201.0430095334.

The spelling of 8125815 in words is "eight million, one hundred twenty-five thousand, eight hundred fifteen".