1288015 has 16 divisors (see below), whose sum is σ = 1624896. Its totient is φ = 979200.

The previous prime is 1288013. The next prime is 1288033. The reversal of 1288015 is 5108821.

1288015 = 286² + 287² + ... + 300².

It is not a de Polignac number, because 1288015 - 2¹ = 1288013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12454 + ... + 12556.

It is an arithmetic number, because the mean of its divisors is an integer number (101556).

2^1288015 is an apocalyptic number.

1288015 is a deficient number, since it is larger than the sum of its proper divisors (336881).

1288015 is a wasteful number, since it uses less digits than its factorization.

1288015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 1288015 is about 1134.9074852163. The cubic root of 1288015 is about 108.8028588764.

The spelling of 1288015 in words is "one million, two hundred eighty-eight thousand, fifteen".