1311444 has 24 divisors (see below), whose sum is σ = 3400320. Its totient is φ = 437112.

The previous prime is 1311433. The next prime is 1311449. The reversal of 1311444 is 4441131.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5964 + ... + 6179.

It is an arithmetic number, because the mean of its divisors is an integer number (141680).

2^1311444 is an apocalyptic number.

It is an amenable number.

1311444 is an abundant number, since it is smaller than the sum of its proper divisors (2088876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311444 is a wasteful number, since it uses less digits than its factorization.

1311444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12156 (or 12148 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 1311444 is about 1145.1829548155. The cubic root of 1311444 is about 109.4586069855.

Adding to 1311444 its reverse (4441131), we get a palindrome (5752575).

The spelling of 1311444 in words is "one million, three hundred eleven thousand, four hundred forty-four".