1283040 has 168 divisors, whose sum is σ = 4957848. Its totient is φ = 311040.
The previous prime is 1283027. The next prime is 1283063. The reversal of 1283040 is 403821.
It is a happy number.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a nialpdrome in base 6.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 116635 + ... + 116645.
It is an arithmetic number, because the mean of its divisors is an integer number (29511).
21283040 is an apocalyptic number.
1283040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1283040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2478924).
1283040 is an abundant number, since it is smaller than the sum of its proper divisors (3674808).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1283040 is an equidigital number, since it uses as much as digits as its factorization.
1283040 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 44 (or 21 counting only the distinct ones).
The product of its (nonzero) digits is 192, while the sum is 18.
The square root of 1283040 is about 1132.7135560238. The cubic root of 1283040 is about 108.6625932624.
Adding to 1283040 its reverse (403821), we get a palindrome (1686861).
The spelling of 1283040 in words is "one million, two hundred eighty-three thousand, forty".
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