1287748 has 48 divisors (see below), whose sum is σ = 2911104. Its totient is φ = 483840.

The previous prime is 1287743. The next prime is 1287749. The reversal of 1287748 is 8477821.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (1287743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11340 + ... + 11452.

It is an arithmetic number, because the mean of its divisors is an integer number (60648).

2^1287748 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1287748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1455552).

1287748 is an abundant number, since it is smaller than the sum of its proper divisors (1623356).

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

1287748 is a wasteful number, since it uses less digits than its factorization.

1287748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 170 counting only the distinct ones).

The product of its digits is 25088, while the sum is 37.

The square root of 1287748 is about 1134.7898483860. The cubic root of 1287748 is about 108.7953402344.

The spelling of 1287748 in words is "one million, two hundred eighty-seven thousand, seven hundred forty-eight".