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1280130 = 23571601
BaseRepresentation
bin100111000100010000010
32102001000020
410320202002
5311431010
643234310
713611105
oct4704202
92361006
101280130
117a4865
12518996
1335a897
1425473c
151a4470
hex138882

1280130 has 32 divisors (see below), whose sum is σ = 3120768. Its totient is φ = 336000.

The previous prime is 1280129. The next prime is 1280131. The reversal of 1280130 is 310821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1280129) and next prime (1280131).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1280131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1830 + ... + 2430.

It is an arithmetic number, because the mean of its divisors is an integer number (97524).

21280130 is an apocalyptic number.

1280130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1280130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1560384).

1280130 is an abundant number, since it is smaller than the sum of its proper divisors (1840638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1280130 is a wasteful number, since it uses less digits than its factorization.

1280130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1280130 is about 1131.4283008658. The cubic root of 1280130 is about 108.5803803132.

Adding to 1280130 its reverse (310821), we get a palindrome (1590951).

The spelling of 1280130 in words is "one million, two hundred eighty thousand, one hundred thirty".

Divisors: 1 2 3 5 6 10 15 30 71 142 213 355 426 601 710 1065 1202 1803 2130 3005 3606 6010 9015 18030 42671 85342 128013 213355 256026 426710 640065 1280130