8122520 has 32 divisors (see below), whose sum is σ = 20887200. Its totient is φ = 2784768.

The previous prime is 8122501. The next prime is 8122537. The reversal of 8122520 is 252218.

8122520 = T₁₈₀₀ + T₁₈₀₁ + ... + T₁₈₀₄.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 8122492 and 8122501.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 14225 + ... + 14784.

It is an arithmetic number, because the mean of its divisors is an integer number (652725).

Almost surely, 2^8122520 is an apocalyptic number.

It is an amenable number.

8122520 is an abundant number, since it is smaller than the sum of its proper divisors (12764680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8122520 is a wasteful number, since it uses less digits than its factorization.

8122520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29027 (or 29023 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 8122520 is about 2850.0035087698. The cubic root of 8122520 is about 201.0158316944.

Subtracting from 8122520 its sum of digits (20), we obtain a square (8122500 = 2850²).

Adding to 8122520 its reverse (252218), we get a palindrome (8374738).

The spelling of 8122520 in words is "eight million, one hundred twenty-two thousand, five hundred twenty".