1288847 has 12 divisors (see below), whose sum is σ = 1552680. Its totient is φ = 1065456.

The previous prime is 1288843. The next prime is 1288849. The reversal of 1288847 is 7488821.

It is a happy number.

It is not a de Polignac number, because 1288847 - 2² = 1288843 is a prime.

It is a super-2 number, since 2×1288847² = 3322253178818, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1288847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 968 + ... + 1874.

It is an arithmetic number, because the mean of its divisors is an integer number (129390).

2^1288847 is an apocalyptic number.

1288847 is a deficient number, since it is larger than the sum of its proper divisors (263833).

1288847 is an equidigital number, since it uses as much as digits as its factorization.

1288847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950 (or 943 counting only the distinct ones).

The product of its digits is 28672, while the sum is 38.

The square root of 1288847 is about 1135.2739757433. The cubic root of 1288847 is about 108.8262810917.

The spelling of 1288847 in words is "one million, two hundred eighty-eight thousand, eight hundred forty-seven".