1244505 has 16 divisors (see below), whose sum is σ = 2007360. Its totient is φ = 658368.

The previous prime is 1244501. The next prime is 1244521. The reversal of 1244505 is 5054421.

It is not a de Polignac number, because 1244505 - 2² = 1244501 is a prime.

It is an Ulam number.

1244505 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2191 + ... + 2699.

It is an arithmetic number, because the mean of its divisors is an integer number (125460).

2^1244505 is an apocalyptic number.

1244505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1244505 is a deficient number, since it is larger than the sum of its proper divisors (762855).

1244505 is a wasteful number, since it uses less digits than its factorization.

1244505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 1244505 is about 1115.5738433649. The cubic root of 1244505 is about 107.5636543865.

Adding to 1244505 its reverse (5054421), we get a palindrome (6298926).

The spelling of 1244505 in words is "one million, two hundred forty-four thousand, five hundred five".