1311288 has 32 divisors (see below), whose sum is σ = 3576960. Its totient is φ = 397280.

The previous prime is 1311287. The next prime is 1311301. The reversal of 1311288 is 8821131.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311287) 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, 2220 + ... + 2747.

It is an arithmetic number, because the mean of its divisors is an integer number (111780).

2^1311288 is an apocalyptic number.

It is an amenable number.

1311288 is an abundant number, since it is smaller than the sum of its proper divisors (2265672).

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

1311288 is a wasteful number, since it uses less digits than its factorization.

1311288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4987 (or 4983 counting only the distinct ones).

The product of its digits is 384, while the sum is 24.

The square root of 1311288 is about 1145.1148414024. The cubic root of 1311288 is about 109.4542666757.

The spelling of 1311288 in words is "one million, three hundred eleven thousand, two hundred eighty-eight".