8525749 has 2 divisors, whose sum is σ = 8525750. Its totient is φ = 8525748.

The previous prime is 8525747. The next prime is 8525761. The reversal of 8525749 is 9475258.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8514724 + 11025 = 2918^2 + 105^2 .

It is a cyclic number.

It is not a de Polignac number, because 8525749 - 2¹ = 8525747 is a prime.

It is a super-2 number, since 2×8525749² = 145376792022002, which contains 22 as substring.

Together with 8525747, it forms a pair of twin primes.

8525749 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8525747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4262874 + 4262875.

It is an arithmetic number, because the mean of its divisors is an integer number (4262875).

Almost surely, 2^8525749 is an apocalyptic number.

It is an amenable number.

8525749 is a deficient number, since it is larger than the sum of its proper divisors (1).

8525749 is an equidigital number, since it uses as much as digits as its factorization.

8525749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 40.

The square root of 8525749 is about 2919.8885252694. Note that the first 3 decimals coincide. The cubic root of 8525749 is about 204.2886229207.

The spelling of 8525749 in words is "eight million, five hundred twenty-five thousand, seven hundred forty-nine".