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1280230 = 25718289
BaseRepresentation
bin100111000100011100110
32102001010221
410320203212
5311431410
643234554
713611310
oct4704346
92361127
101280230
117a4946
12518a5a
1335a943
142547b0
151a44da
hex1388e6

1280230 has 16 divisors (see below), whose sum is σ = 2633760. Its totient is φ = 438912.

The previous prime is 1280221. The next prime is 1280231. The reversal of 1280230 is 320821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9075 + ... + 9214.

It is an arithmetic number, because the mean of its divisors is an integer number (164610).

21280230 is an apocalyptic number.

1280230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1280230 is an abundant number, since it is smaller than the sum of its proper divisors (1353530).

1280230 is a wasteful number, since it uses less digits than its factorization.

1280230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18303.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1280230 is about 1131.4724919325. The cubic root of 1280230 is about 108.5832075665.

The spelling of 1280230 in words is "one million, two hundred eighty thousand, two hundred thirty".

Divisors: 1 2 5 7 10 14 35 70 18289 36578 91445 128023 182890 256046 640115 1280230