1312830 has 48 divisors (see below), whose sum is σ = 3538080. Its totient is φ = 337344.

The previous prime is 1312823. The next prime is 1312841. The reversal of 1312830 is 382131.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2359 + ... + 2861.

It is an arithmetic number, because the mean of its divisors is an integer number (73710).

2^1312830 is an apocalyptic number.

1312830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1769040).

1312830 is an abundant number, since it is smaller than the sum of its proper divisors (2225250).

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

1312830 is a wasteful number, since it uses less digits than its factorization.

1312830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 542 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1312830 is about 1145.7879384947. The cubic root of 1312830 is about 109.4971538636.

Adding to 1312830 its reverse (382131), we get a palindrome (1694961).

The spelling of 1312830 in words is "one million, three hundred twelve thousand, eight hundred thirty".