8641525 has 12 divisors (see below), whose sum is σ = 11346372. Its totient is φ = 6506240.

The previous prime is 8641519. The next prime is 8641541. The reversal of 8641525 is 5251468.

It can be written as a sum of positive squares in 6 ways, for example, as 790321 + 7851204 = 889^2 + 2802^2 .

It is not a de Polignac number, because 8641525 - 2³ = 8641517 is a prime.

It is a Duffinian number.

8641525 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9742 + ... + 10591.

It is an arithmetic number, because the mean of its divisors is an integer number (945531).

Almost surely, 2^8641525 is an apocalyptic number.

8641525 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8641525 is a deficient number, since it is larger than the sum of its proper divisors (2704847).

8641525 is a wasteful number, since it uses less digits than its factorization.

8641525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20360 (or 20355 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 8641525 is about 2939.6470876621. The cubic root of 8641525 is about 205.2091856378.

The spelling of 8641525 in words is "eight million, six hundred forty-one thousand, five hundred twenty-five".