1311438 has 16 divisors (see below), whose sum is σ = 2713680. Its totient is φ = 422016.

The previous prime is 1311433. The next prime is 1311449. The reversal of 1311438 is 8341131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3595 + ... + 3942.

It is an arithmetic number, because the mean of its divisors is an integer number (169605).

2^1311438 is an apocalyptic number.

1311438 is an abundant number, since it is smaller than the sum of its proper divisors (1402242).

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

1311438 is a wasteful number, since it uses less digits than its factorization.

1311438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7571.

The product of its digits is 288, while the sum is 21.

The square root of 1311438 is about 1145.1803351438. The cubic root of 1311438 is about 109.4584400569.

Adding to 1311438 its reverse (8341131), we get a palindrome (9652569).

The spelling of 1311438 in words is "one million, three hundred eleven thousand, four hundred thirty-eight".