1281488 has 40 divisors (see below), whose sum is σ = 2744616. Its totient is φ = 576000.

The previous prime is 1281463. The next prime is 1281503. The reversal of 1281488 is 8841821.

It can be written as a sum of positive squares in 4 ways, for example, as 44944 + 1236544 = 212^2 + 1112^2 .

It is a super-2 number, since 2×1281488² = 3284422988288, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12638 + ... + 12738.

2^1281488 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 1281488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1372308).

1281488 is an abundant number, since it is smaller than the sum of its proper divisors (1463128).

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

1281488 is a wasteful number, since it uses less digits than its factorization.

1281488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 177 counting only the distinct ones).

The product of its digits is 4096, while the sum is 32.

The square root of 1281488 is about 1132.0282681983. The cubic root of 1281488 is about 108.6187618439.

The spelling of 1281488 in words is "one million, two hundred eighty-one thousand, four hundred eighty-eight".