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126380 = 2257189
BaseRepresentation
bin11110110110101100
320102100202
4132312230
513021010
62413032
71034312
oct366654
9212322
10126380
1186a51
1261178
13456a7
14340b2
15276a5
hex1edac

126380 has 24 divisors (see below), whose sum is σ = 272160. Its totient is φ = 49280.

The previous prime is 126359. The next prime is 126397. The reversal of 126380 is 83621.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1376 + ... + 1464.

It is an arithmetic number, because the mean of its divisors is an integer number (11340).

2126380 is an apocalyptic number.

126380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a pronic number, being equal to 355×356.

It is an amenable number.

126380 is an abundant number, since it is smaller than the sum of its proper divisors (145780).

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

126380 is a wasteful number, since it uses less digits than its factorization.

126380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 126380 is about 355.4996483824. The cubic root of 126380 is about 50.1833270027.

The spelling of 126380 in words is "one hundred twenty-six thousand, three hundred eighty".

Divisors: 1 2 4 5 10 20 71 89 142 178 284 355 356 445 710 890 1420 1780 6319 12638 25276 31595 63190 126380