1312740 has 192 divisors, whose sum is σ = 5080320. Its totient is φ = 276480.

The previous prime is 1312739. The next prime is 1312769. The reversal of 1312740 is 472131.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 77212 + ... + 77228.

It is an arithmetic number, because the mean of its divisors is an integer number (26460).

2^1312740 is an apocalyptic number.

1312740 is a gapful number since it is divisible by the number (10) 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 1312740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2540160).

1312740 is an abundant number, since it is smaller than the sum of its proper divisors (3767580).

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

1312740 is a wasteful number, since it uses less digits than its factorization.

1312740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 1312740 is about 1145.7486635384. The cubic root of 1312740 is about 109.4946516434.

Adding to 1312740 its reverse (472131), we get a palindrome (1784871).

The spelling of 1312740 in words is "one million, three hundred twelve thousand, seven hundred forty".