2139125966 has 8 divisors (see below), whose sum is σ = 3247348104. Its totient is φ = 1056676600.

The previous prime is 2139125921. The next prime is 2139125969. The reversal of 2139125966 is 6695219312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139125969) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6442985 + ... + 6443316.

It is an arithmetic number, because the mean of its divisors is an integer number (405918513).

Almost surely, 2^2139125966 is an apocalyptic number.

2139125966 is a deficient number, since it is larger than the sum of its proper divisors (1108222138).

2139125966 is a wasteful number, since it uses less digits than its factorization.

2139125966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12886386.

The product of its digits is 174960, while the sum is 44.

The square root of 2139125966 is about 46250.6861138297. The cubic root of 2139125966 is about 1288.4832775995.

The spelling of 2139125966 in words is "two billion, one hundred thirty-nine million, one hundred twenty-five thousand, nine hundred sixty-six".