Search a number
-
+
1261130 = 251389109
BaseRepresentation
bin100110011111001001010
32101001221112
410303321022
5310324010
643010322
713501523
oct4637112
92331845
101261130
11791562
125099a2
13352040
1424b84a
1519da05
hex133e4a

1261130 has 32 divisors (see below), whose sum is σ = 2494800. Its totient is φ = 456192.

The previous prime is 1261121. The next prime is 1261133. The reversal of 1261130 is 311621.

It is a Cunningham number, because it is equal to 11232+1.

It can be written as a sum of positive squares in 8 ways, for example, as 243049 + 1018081 = 493^2 + 1009^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11516 + ... + 11624.

21261130 is an apocalyptic number.

1261130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1261130 is a deficient number, since it is larger than the sum of its proper divisors (1233670).

1261130 is a wasteful number, since it uses less digits than its factorization.

1261130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1261130 is about 1123.0004452359. Note that the first 3 decimals coincide. The cubic root of 1261130 is about 108.0405083526.

Adding to 1261130 its reverse (311621), we get a palindrome (1572751).

The spelling of 1261130 in words is "one million, two hundred sixty-one thousand, one hundred thirty".

Divisors: 1 2 5 10 13 26 65 89 109 130 178 218 445 545 890 1090 1157 1417 2314 2834 5785 7085 9701 11570 14170 19402 48505 97010 126113 252226 630565 1261130