1312788 has 24 divisors (see below), whose sum is σ = 3162880. Its totient is φ = 423360.

The previous prime is 1312777. The next prime is 1312789. The reversal of 1312788 is 8872131.

It is a happy number.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1393 + ... + 2136.

2^1312788 is an apocalyptic number.

It is an amenable number.

1312788 is an abundant number, since it is smaller than the sum of its proper divisors (1850092).

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

1312788 is a wasteful number, since it uses less digits than its factorization.

1312788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567 (or 3565 counting only the distinct ones).

The product of its digits is 2688, while the sum is 30.

The square root of 1312788 is about 1145.7696103493. The cubic root of 1312788 is about 109.4959861751.

The spelling of 1312788 in words is "one million, three hundred twelve thousand, seven hundred eighty-eight".