1113638 has 4 divisors (see below), whose sum is σ = 1670460. Its totient is φ = 556818.

The previous prime is 1113617. The next prime is 1113643. The reversal of 1113638 is 8363111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8363111 = 389 ⋅21499.

It is a congruent 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, 278408 + ... + 278411.

It is an arithmetic number, because the mean of its divisors is an integer number (417615).

2^1113638 is an apocalyptic number.

1113638 is a deficient number, since it is larger than the sum of its proper divisors (556822).

1113638 is an equidigital number, since it uses as much as digits as its factorization.

1113638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556821.

The product of its digits is 432, while the sum is 23.

The square root of 1113638 is about 1055.2904813368. The cubic root of 1113638 is about 103.6528737326.

Adding to 1113638 its reverse (8363111), we get a palindrome (9476749).

The spelling of 1113638 in words is "one million, one hundred thirteen thousand, six hundred thirty-eight".