4525209 has 12 divisors (see below), whose sum is σ = 7039396. Its totient is φ = 2784672.

The previous prime is 4525201. The next prime is 4525217. The reversal of 4525209 is 9025254.

4525209 is a `hidden beast` number, since 452 + 5 + 209 = 666.

It is an interprime number because it is at equal distance from previous prime (4525201) and next prime (4525217).

It can be written as a sum of positive squares in 2 ways, for example, as 363609 + 4161600 = 603^2 + 2040^2 .

It is not a de Polignac number, because 4525209 - 2³ = 4525201 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4525201) 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, 19222 + ... + 19455.

Almost surely, 2^4525209 is an apocalyptic number.

It is an amenable number.

4525209 is a deficient number, since it is larger than the sum of its proper divisors (2514187).

4525209 is a wasteful number, since it uses less digits than its factorization.

4525209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38696 (or 38693 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 4525209 is about 2127.2538635527. The cubic root of 4525209 is about 165.4040784904.

The spelling of 4525209 in words is "four million, five hundred twenty-five thousand, two hundred nine".