2002138 has 4 divisors (see below), whose sum is σ = 3003210. Its totient is φ = 1001068.

The previous prime is 2002093. The next prime is 2002151. The reversal of 2002138 is 8312002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8312002 = 2 ⋅4156001.

It can be written as a sum of positive squares in only one way, i.e., 1530169 + 471969 = 1237^2 + 687^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500533 + ... + 500536.

2^2002138 is an apocalyptic number.

2002138 is a deficient number, since it is larger than the sum of its proper divisors (1001072).

2002138 is a wasteful number, since it uses less digits than its factorization.

2002138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001071.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2002138 is about 1414.9692576166. The cubic root of 2002138 is about 126.0369841881.

The spelling of 2002138 in words is "two million, two thousand, one hundred thirty-eight".