1330785 has 12 divisors (see below), whose sum is σ = 2306772. Its totient is φ = 709728.
The previous prime is 1330783. The next prime is 1330787. The reversal of 1330785 is 5870331.
It is an interprime number because it is at equal distance from previous prime (1330783) and next prime (1330787).
It can be written as a sum of positive squares in 2 ways, for example, as 314721 + 1016064 = 561^2 + 1008^2 .
It is not a de Polignac number, because 1330785 - 21 = 1330783 is a prime.
1330785 is a lucky number.
It is not an unprimeable number, because it can be changed into a prime (1330783) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14742 + ... + 14831.
It is an arithmetic number, because the mean of its divisors is an integer number (192231).
21330785 is an apocalyptic number.
1330785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.
It is an amenable number.
1330785 is a deficient number, since it is larger than the sum of its proper divisors (975987).
1330785 is a wasteful number, since it uses less digits than its factorization.
1330785 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 29584 (or 29581 counting only the distinct ones).
The product of its (nonzero) digits is 2520, while the sum is 27.
The square root of 1330785 is about 1153.5965499255. The cubic root of 1330785 is about 109.9940768160.
The spelling of 1330785 in words is "one million, three hundred thirty thousand, seven hundred eighty-five".
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