1288734 has 8 divisors (see below), whose sum is σ = 2577480. Its totient is φ = 429576.

The previous prime is 1288733. The next prime is 1288769. The reversal of 1288734 is 4378821.

It is a sphenic number, since it is the product of 3 distinct primes.

1288734 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1288695 and 1288704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107389 + ... + 107400.

It is an arithmetic number, because the mean of its divisors is an integer number (322185).

2^1288734 is an apocalyptic number.

1288734 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1288734 is a wasteful number, since it uses less digits than its factorization.

1288734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214794.

The product of its digits is 10752, while the sum is 33.

The square root of 1288734 is about 1135.2242069301. The cubic root of 1288734 is about 108.8231005411.

It can be divided in two parts, 12887 and 34, that added together give a palindrome (12921).

The spelling of 1288734 in words is "one million, two hundred eighty-eight thousand, seven hundred thirty-four".