1311432 has 32 divisors (see below), whose sum is σ = 3343680. Its totient is φ = 428480.

The previous prime is 1311419. The next prime is 1311433. The reversal of 1311432 is 2341131.

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

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, 757 + ... + 1787.

It is an arithmetic number, because the mean of its divisors is an integer number (104490).

2^1311432 is an apocalyptic number.

1311432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1671840).

1311432 is an abundant number, since it is smaller than the sum of its proper divisors (2032248).

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

1311432 is a wasteful number, since it uses less digits than its factorization.

1311432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093 (or 1089 counting only the distinct ones).

The product of its digits is 72, while the sum is 15.

The square root of 1311432 is about 1145.1777154660. The cubic root of 1311432 is about 109.4582731278.

Adding to 1311432 its reverse (2341131), we get a palindrome (3652563).

The spelling of 1311432 in words is "one million, three hundred eleven thousand, four hundred thirty-two".