1330138 has 4 divisors (see below), whose sum is σ = 1995210. Its totient is φ = 665068.

The previous prime is 1330129. The next prime is 1330157. The reversal of 1330138 is 8310331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1329409 + 729 = 1153^2 + 27^2 .

It is an Ulam 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 as a sum of consecutive naturals, namely, 332533 + ... + 332536.

2^1330138 is an apocalyptic number.

1330138 is a deficient number, since it is larger than the sum of its proper divisors (665072).

1330138 is an equidigital number, since it uses as much as digits as its factorization.

1330138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665071.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1330138 is about 1153.3160885031. The cubic root of 1330138 is about 109.9762483153.

Adding to 1330138 its reverse (8310331), we get a palindrome (9640469).

The spelling of 1330138 in words is "one million, three hundred thirty thousand, one hundred thirty-eight".