1238663 has 4 divisors (see below), whose sum is σ = 1262088. Its totient is φ = 1215240.

The previous prime is 1238659. The next prime is 1238681. The reversal of 1238663 is 3668321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3668321 = 409 ⋅8969.

It is a cyclic number.

It is not a de Polignac number, because 1238663 - 2² = 1238659 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238683) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 11633 + ... + 11738.

It is an arithmetic number, because the mean of its divisors is an integer number (315522).

2^1238663 is an apocalyptic number.

1238663 is a deficient number, since it is larger than the sum of its proper divisors (23425).

1238663 is an equidigital number, since it uses as much as digits as its factorization.

1238663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23424.

The product of its digits is 5184, while the sum is 29.

The square root of 1238663 is about 1112.9523799337. The cubic root of 1238663 is about 107.3950806144.

The spelling of 1238663 in words is "one million, two hundred thirty-eight thousand, six hundred sixty-three".