4209025129 has 3 divisors (see below), whose sum is σ = 4209090007. Its totient is φ = 4208960252.

The previous prime is 4209025127. The next prime is 4209025151. The reversal of 4209025129 is 9215209024.

The square root of 4209025129 is 64877.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 4115864025 + 93161104 = 64155^2 + 9652^2 .

It is not a de Polignac number, because 4209025129 - 2¹ = 4209025127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4209025094 and 4209025103.

It is not an unprimeable number, because it can be changed into a prime (4209025127) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 32439 + ... + 97315.

Almost surely, 2^4209025129 is an apocalyptic number.

4209025129 is the 64877-th square number.

4209025129 is the 32439-th centered octagonal number.

It is an amenable number.

4209025129 is a deficient number, since it is larger than the sum of its proper divisors (64878).

4209025129 is an frugal number, since it uses more digits than its factorization.

4209025129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129754 (or 64877 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The cubic root of 4209025129 is about 1614.5834860289.

The spelling of 4209025129 in words is "four billion, two hundred nine million, twenty-five thousand, one hundred twenty-nine".