2125685345 has 32 divisors (see below), whose sum is σ = 3043215360. Its totient is φ = 1394680320.

The previous prime is 2125685327. The next prime is 2125685381. The reversal of 2125685345 is 5435865212.

It is not a de Polignac number, because 2125685345 - 2¹⁰ = 2125684321 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85559 + ... + 107571.

It is an arithmetic number, because the mean of its divisors is an integer number (95100480).

Almost surely, 2^2125685345 is an apocalyptic number.

It is an amenable number.

2125685345 is a deficient number, since it is larger than the sum of its proper divisors (917530015).

2125685345 is a wasteful number, since it uses less digits than its factorization.

2125685345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22145.

The product of its digits is 288000, while the sum is 41.

The square root of 2125685345 is about 46105.1552974285. The cubic root of 2125685345 is about 1285.7789934129.

It can be divided in two parts, 21256 and 85345, that added together give a palindrome (106601).

The spelling of 2125685345 in words is "two billion, one hundred twenty-five million, six hundred eighty-five thousand, three hundred forty-five".