2171138 has 8 divisors (see below), whose sum is σ = 3448332. Its totient is φ = 1021696.

The previous prime is 2171119. The next prime is 2171159. The reversal of 2171138 is 8311712.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2053489 + 117649 = 1433^2 + 343^2 .

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

It is a Curzon number.

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31895 + ... + 31962.

2^2171138 is an apocalyptic number.

2171138 is a deficient number, since it is larger than the sum of its proper divisors (1277194).

2171138 is a wasteful number, since it uses less digits than its factorization.

2171138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63876.

The product of its digits is 336, while the sum is 23.

The square root of 2171138 is about 1473.4781980063. The cubic root of 2171138 is about 129.4878866444.

The spelling of 2171138 in words is "two million, one hundred seventy-one thousand, one hundred thirty-eight".