1312730 has 16 divisors (see below), whose sum is σ = 2376864. Its totient is φ = 522000.

The previous prime is 1312681. The next prime is 1312733. The reversal of 1312730 is 372131.

It is a junction number, because it is equal to n+sod(n) for n = 1312699 and 1312708.

It is not an unprimeable number, because it can be changed into a prime (1312733) 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, 2249 + ... + 2771.

It is an arithmetic number, because the mean of its divisors is an integer number (148554).

2^1312730 is an apocalyptic number.

1312730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1312730 is a deficient number, since it is larger than the sum of its proper divisors (1064134).

1312730 is a wasteful number, since it uses less digits than its factorization.

1312730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781.

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 1312730 is about 1145.7442995712. The cubic root of 1312730 is about 109.4943736119.

Adding to 1312730 its reverse (372131), we get a palindrome (1684861).

The spelling of 1312730 in words is "one million, three hundred twelve thousand, seven hundred thirty".