1200138 has 8 divisors (see below), whose sum is σ = 2400288. Its totient is φ = 400044.

The previous prime is 1200109. The next prime is 1200139. The reversal of 1200138 is 8310021.

It is a happy number.

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

1200138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1200139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100006 + ... + 100017.

It is an arithmetic number, because the mean of its divisors is an integer number (300036).

2^1200138 is an apocalyptic number.

1200138 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.

1200138 is a wasteful number, since it uses less digits than its factorization.

1200138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200028.

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

The square root of 1200138 is about 1095.5081012936. The cubic root of 1200138 is about 106.2699302866.

Adding to 1200138 its reverse (8310021), we get a palindrome (9510159).

It can be divided in two parts, 120013 and 8, that added together give a palindrome (120021).

The spelling of 1200138 in words is "one million, two hundred thousand, one hundred thirty-eight".