1288545 has 8 divisors (see below), whose sum is σ = 2061696. Its totient is φ = 687216.

The previous prime is 1288543. The next prime is 1288559. The reversal of 1288545 is 5458821.

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

It is not a de Polignac number, because 1288545 - 2¹ = 1288543 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1288541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42937 + ... + 42966.

It is an arithmetic number, because the mean of its divisors is an integer number (257712).

2^1288545 is an apocalyptic number.

1288545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1288545 is a deficient number, since it is larger than the sum of its proper divisors (773151).

1288545 is an equidigital number, since it uses as much as digits as its factorization.

1288545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85911.

The product of its digits is 12800, while the sum is 33.

The square root of 1288545 is about 1135.1409604098. The cubic root of 1288545 is about 108.8177804437.

The spelling of 1288545 in words is "one million, two hundred eighty-eight thousand, five hundred forty-five".