2125948209 has 64 divisors (see below), whose sum is σ = 3939010560. Its totient is φ = 984683520.

The previous prime is 2125948207. The next prime is 2125948273. The reversal of 2125948209 is 9028495212.

It is a happy number.

It is not a de Polignac number, because 2125948209 - 2¹ = 2125948207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2125948207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 60367 + ... + 88859.

It is an arithmetic number, because the mean of its divisors is an integer number (61547040).

Almost surely, 2^2125948209 is an apocalyptic number.

It is an amenable number.

2125948209 is a deficient number, since it is larger than the sum of its proper divisors (1813062351).

2125948209 is a wasteful number, since it uses less digits than its factorization.

2125948209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28550.

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 2125948209 is about 46108.0059100369. The cubic root of 2125948209 is about 1285.8319913914.

The spelling of 2125948209 in words is "two billion, one hundred twenty-five million, nine hundred forty-eight thousand, two hundred nine".