1002138 has 8 divisors (see below), whose sum is σ = 2004288. Its totient is φ = 334044.

The previous prime is 1002121. The next prime is 1002143. The reversal of 1002138 is 8312001.

It is a happy number.

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

1002138 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83506 + ... + 83517.

It is an arithmetic number, because the mean of its divisors is an integer number (250536).

2^1002138 is an apocalyptic number.

1002138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1002138 is a wasteful number, since it uses less digits than its factorization.

1002138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167028.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1002138 is about 1001.0684292295. The cubic root of 1002138 is about 100.0712159375.

Adding to 1002138 its reverse (8312001), we get a palindrome (9314139).

The spelling of 1002138 in words is "one million, two thousand, one hundred thirty-eight".