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1256255 = 571113251
BaseRepresentation
bin100110010101100111111
32100211020222
410302230333
5310200010
642531555
713451360
oct4625477
92324228
101256255
11788930
12506bbb
1334ca60
14249b67
1519c355
hex132b3f

1256255 has 32 divisors (see below), whose sum is σ = 2032128. Its totient is φ = 720000.

The previous prime is 1256243. The next prime is 1256267. The reversal of 1256255 is 5526521.

It is an interprime number because it is at equal distance from previous prime (1256243) and next prime (1256267).

It is not a de Polignac number, because 1256255 - 212 = 1252159 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 4880 + ... + 5130.

It is an arithmetic number, because the mean of its divisors is an integer number (63504).

21256255 is an apocalyptic number.

1256255 is a deficient number, since it is larger than the sum of its proper divisors (775873).

1256255 is a wasteful number, since it uses less digits than its factorization.

1256255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287.

The product of its digits is 3000, while the sum is 26.

The square root of 1256255 is about 1120.8278190695. The cubic root of 1256255 is about 107.9011154792.

It can be divided in two parts, 125 and 6255, that multiplied together give a triangular number (781875 = T1250).

The spelling of 1256255 in words is "one million, two hundred fifty-six thousand, two hundred fifty-five".

Divisors: 1 5 7 11 13 35 55 65 77 91 143 251 385 455 715 1001 1255 1757 2761 3263 5005 8785 13805 16315 19327 22841 35893 96635 114205 179465 251251 1256255