8252521 has 4 divisors (see below), whose sum is σ = 8453844. Its totient is φ = 8051200.

The previous prime is 8252509. The next prime is 8252533. The reversal of 8252521 is 1252528.

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

It is an interprime number because it is at equal distance from previous prime (8252509) and next prime (8252533).

It can be written as a sum of positive squares in 2 ways, for example, as 1155625 + 7096896 = 1075^2 + 2664^2 .

It is a cyclic number.

It is not a de Polignac number, because 8252521 - 2¹³ = 8244329 is a prime.

It is a Duffinian number.

8252521 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8252551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100600 + ... + 100681.

It is an arithmetic number, because the mean of its divisors is an integer number (2113461).

Almost surely, 2^8252521 is an apocalyptic number.

It is an amenable number.

8252521 is a deficient number, since it is larger than the sum of its proper divisors (201323).

8252521 is a wasteful number, since it uses less digits than its factorization.

8252521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201322.

The product of its digits is 1600, while the sum is 25.

The square root of 8252521 is about 2872.7201395193. The cubic root of 8252521 is about 202.0825806847.

The spelling of 8252521 in words is "eight million, two hundred fifty-two thousand, five hundred twenty-one".