8125520 has 60 divisors (see below), whose sum is σ = 20490876. Its totient is φ = 2995200.

The previous prime is 8125519. The next prime is 8125529. The reversal of 8125520 is 255218.

It can be written as a sum of positive squares in 6 ways, for example, as 595984 + 7529536 = 772^2 + 2744^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8125529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13220 + ... + 13820.

Almost surely, 2^8125520 is an apocalyptic number.

8125520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8125520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10245438).

8125520 is an abundant number, since it is smaller than the sum of its proper divisors (12365356).

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

8125520 is a wasteful number, since it uses less digits than its factorization.

8125520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 621 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 8125520 is about 2850.5297753225. The cubic root of 8125520 is about 201.0405766121.

The spelling of 8125520 in words is "eight million, one hundred twenty-five thousand, five hundred twenty".