1288312 has 8 divisors (see below), whose sum is σ = 2415600. Its totient is φ = 644152.

The previous prime is 1288307. The next prime is 1288337. The reversal of 1288312 is 2138821.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80512 + ... + 80527.

It is an arithmetic number, because the mean of its divisors is an integer number (301950).

2^1288312 is an apocalyptic number.

It is an amenable number.

1288312 is a deficient number, since it is larger than the sum of its proper divisors (1127288).

1288312 is a wasteful number, since it uses less digits than its factorization.

1288312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161045 (or 161041 counting only the distinct ones).

The product of its digits is 768, while the sum is 25.

The square root of 1288312 is about 1135.0383253441. The cubic root of 1288312 is about 108.8112210889.

It can be divided in two parts, 1288 and 312, that multiplied together give a triangular number (401856 = T₈₉₆).

The spelling of 1288312 in words is "one million, two hundred eighty-eight thousand, three hundred twelve".