1210138 has 4 divisors (see below), whose sum is σ = 1815210. Its totient is φ = 605068.

The previous prime is 1210127. The next prime is 1210151. The reversal of 1210138 is 8310121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8310121 = 1447 ⋅5743.

It can be written as a sum of positive squares in only one way, i.e., 1172889 + 37249 = 1083^2 + 193^2 .

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, 302533 + ... + 302536.

2^1210138 is an apocalyptic number.

1210138 is a deficient number, since it is larger than the sum of its proper divisors (605072).

1210138 is an equidigital number, since it uses as much as digits as its factorization.

1210138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605071.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1210138 is about 1100.0627254843. The cubic root of 1210138 is about 106.5642745725.

Adding to 1210138 its reverse (8310121), we get a palindrome (9520259).

The spelling of 1210138 in words is "one million, two hundred ten thousand, one hundred thirty-eight".