1243138 has 16 divisors (see below), whose sum is σ = 2028600. Its totient is φ = 567936.

The previous prime is 1243133. The next prime is 1243141. The reversal of 1243138 is 8313421.

It can be written as a sum of positive squares in 4 ways, for example, as 1034289 + 208849 = 1017^2 + 457^2 .

It is not an unprimeable number, because it can be changed into a prime (1243133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3388 + ... + 3736.

2^1243138 is an apocalyptic number.

1243138 is a deficient number, since it is larger than the sum of its proper divisors (785462).

1243138 is a wasteful number, since it uses less digits than its factorization.

1243138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501.

The product of its digits is 576, while the sum is 22.

The square root of 1243138 is about 1114.9609858645. The cubic root of 1243138 is about 107.5242562895.

Adding to 1243138 its reverse (8313421), we get a palindrome (9556559).

The spelling of 1243138 in words is "one million, two hundred forty-three thousand, one hundred thirty-eight".