8525909 has 16 divisors (see below), whose sum is σ = 10166016. Its totient is φ = 6998400.

The previous prime is 8525897. The next prime is 8525969. The reversal of 8525909 is 9095258.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 8525909 - 2¹² = 8521813 is a prime.

It is a super-2 number, since 2×8525909² = 145382248552562, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8525969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17264 + ... + 17750.

It is an arithmetic number, because the mean of its divisors is an integer number (635376).

Almost surely, 2^8525909 is an apocalyptic number.

It is an amenable number.

8525909 is a deficient number, since it is larger than the sum of its proper divisors (1640107).

8525909 is a wasteful number, since it uses less digits than its factorization.

8525909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 8525909 is about 2919.9159234471. The cubic root of 8525909 is about 204.2899008524.

The spelling of 8525909 in words is "eight million, five hundred twenty-five thousand, nine hundred nine".