1244855 has 4 divisors (see below), whose sum is σ = 1493832. Its totient is φ = 995880.

The previous prime is 1244839. The next prime is 1244857. The reversal of 1244855 is 5584421.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1244855 - 2⁴ = 1244839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124481 + ... + 124490.

It is an arithmetic number, because the mean of its divisors is an integer number (373458).

2^1244855 is an apocalyptic number.

1244855 is a deficient number, since it is larger than the sum of its proper divisors (248977).

1244855 is an equidigital number, since it uses as much as digits as its factorization.

1244855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248976.

The product of its digits is 6400, while the sum is 29.

The square root of 1244855 is about 1115.7307022754. The cubic root of 1244855 is about 107.5737370432.

The spelling of 1244855 in words is "one million, two hundred forty-four thousand, eight hundred fifty-five".