1238865 has 8 divisors (see below), whose sum is σ = 1982208. Its totient is φ = 660720.

The previous prime is 1238863. The next prime is 1238893. The reversal of 1238865 is 5688321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1238865 - 2¹ = 1238863 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1238863) 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 7 ways as a sum of consecutive naturals, for example, 41281 + ... + 41310.

It is an arithmetic number, because the mean of its divisors is an integer number (247776).

2^1238865 is an apocalyptic number.

1238865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1238865 is a deficient number, since it is larger than the sum of its proper divisors (743343).

1238865 is an equidigital number, since it uses as much as digits as its factorization.

1238865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82599.

The product of its digits is 11520, while the sum is 33.

The square root of 1238865 is about 1113.0431258491. The cubic root of 1238865 is about 107.4009182601.

The spelling of 1238865 in words is "one million, two hundred thirty-eight thousand, eight hundred sixty-five".