1311730 has 24 divisors (see below), whose sum is σ = 2747628. Its totient is φ = 449568.

The previous prime is 1311721. The next prime is 1311733. The reversal of 1311730 is 371131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1117249 + 194481 = 1057^2 + 441^2 .

It is not an unprimeable number, because it can be changed into a prime (1311733) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 849 + ... + 1828.

2^1311730 is an apocalyptic number.

1311730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311730 is an abundant number, since it is smaller than the sum of its proper divisors (1435898).

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

1311730 is a wasteful number, since it uses less digits than its factorization.

1311730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2698 (or 2691 counting only the distinct ones).

The product of its (nonzero) digits is 63, while the sum is 16.

The square root of 1311730 is about 1145.3078188854. The cubic root of 1311730 is about 109.4665633263.

Adding to 1311730 its reverse (371131), we get a palindrome (1682861).

The spelling of 1311730 in words is "one million, three hundred eleven thousand, seven hundred thirty".