1288712 has 16 divisors (see below), whose sum is σ = 2475900. Its totient is φ = 628480.

The previous prime is 1288711. The next prime is 1288733. The reversal of 1288712 is 2178821.

It can be written as a sum of positive squares in 2 ways, for example, as 1012036 + 276676 = 1006^2 + 526^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1288711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1637 + ... + 2292.

2^1288712 is an apocalyptic number.

It is an amenable number.

1288712 is a deficient number, since it is larger than the sum of its proper divisors (1187188).

1288712 is a wasteful number, since it uses less digits than its factorization.

1288712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3976 (or 3972 counting only the distinct ones).

The product of its digits is 1792, while the sum is 29.

The square root of 1288712 is about 1135.2145171729. The cubic root of 1288712 is about 108.8224812973.

It can be divided in two parts, 128 and 8712, that multiplied together give a square (1115136 = 1056²).

The spelling of 1288712 in words is "one million, two hundred eighty-eight thousand, seven hundred twelve".