1284138 has 12 divisors (see below), whose sum is σ = 2782338. Its totient is φ = 428040.

The previous prime is 1284131. The next prime is 1284169. The reversal of 1284138 is 8314821.

It can be written as a sum of positive squares in only one way, i.e., 1238769 + 45369 = 1113^2 + 213^2 .

It is not an unprimeable number, because it can be changed into a prime (1284131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35653 + ... + 35688.

2^1284138 is an apocalyptic number.

1284138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1284138 is an abundant number, since it is smaller than the sum of its proper divisors (1498200).

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

1284138 is a wasteful number, since it uses less digits than its factorization.

1284138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71349 (or 71346 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 1284138 is about 1133.1981291901. The cubic root of 1284138 is about 108.6935815165.

Adding to 1284138 its reverse (8314821), we get a palindrome (9598959).

The spelling of 1284138 in words is "one million, two hundred eighty-four thousand, one hundred thirty-eight".