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1288115 = 5232487
BaseRepresentation
bin100111010011110110011
32102102221222
410322132303
5312204430
643335255
713643303
oct4723663
92372858
101288115
117aa864
1252152b
133613ca
14257603
151a69e5
hex13a7b3

1288115 has 12 divisors (see below), whose sum is σ = 1619184. Its totient is φ = 983664.

The previous prime is 1288109. The next prime is 1288117. The reversal of 1288115 is 5118821.

It is not a de Polignac number, because 1288115 - 24 = 1288099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1288117) 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 11 ways as a sum of consecutive naturals, for example, 2402 + ... + 2888.

It is an arithmetic number, because the mean of its divisors is an integer number (134932).

21288115 is an apocalyptic number.

1288115 is a deficient number, since it is larger than the sum of its proper divisors (331069).

1288115 is an equidigital number, since it uses as much as digits as its factorization.

1288115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538 (or 515 counting only the distinct ones).

The product of its digits is 640, while the sum is 26.

The square root of 1288115 is about 1134.9515408157. The cubic root of 1288115 is about 108.8056745797.

The spelling of 1288115 in words is "one million, two hundred eighty-eight thousand, one hundred fifteen".

Divisors: 1 5 23 115 487 529 2435 2645 11201 56005 257623 1288115