1288560 has 160 divisors (see below), whose sum is σ = 4999680. Its totient is φ = 267264.

The previous prime is 1288559. The next prime is 1288571. The reversal of 1288560 is 658821.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21811 + ... + 21869.

It is an arithmetic number, because the mean of its divisors is an integer number (31248).

2^1288560 is an apocalyptic number.

1288560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1288560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2499840).

1288560 is an abundant number, since it is smaller than the sum of its proper divisors (3711120).

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

1288560 is a wasteful number, since it uses less digits than its factorization.

1288560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 1288560 is about 1135.1475674995. The cubic root of 1288560 is about 108.8182026926.

The spelling of 1288560 in words is "one million, two hundred eighty-eight thousand, five hundred sixty".