1288515 has 32 divisors (see below), whose sum is σ = 2267136. Its totient is φ = 622080.

The previous prime is 1288513. The next prime is 1288519. The reversal of 1288515 is 5158821.

It is not a de Polignac number, because 1288515 - 2¹ = 1288513 is a prime.

It is a Smith number, since the sum of its digits (30) 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 (1288513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7824 + ... + 7986.

It is an arithmetic number, because the mean of its divisors is an integer number (70848).

2^1288515 is an apocalyptic number.

1288515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1288515 is a deficient number, since it is larger than the sum of its proper divisors (978621).

1288515 is a wasteful number, since it uses less digits than its factorization.

1288515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219.

The product of its digits is 3200, while the sum is 30.

The square root of 1288515 is about 1135.1277461149. The cubic root of 1288515 is about 108.8169359359.

The spelling of 1288515 in words is "one million, two hundred eighty-eight thousand, five hundred fifteen".