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129208 = 2331521
BaseRepresentation
bin11111100010111000
320120020111
4133202320
513113313
62434104
71045462
oct374270
9216214
10129208
1189092
1262934
1346a71
1435132
152843d
hex1f8b8

129208 has 16 divisors (see below), whose sum is σ = 250560. Its totient is φ = 62400.

The previous prime is 129197. The next prime is 129209. The reversal of 129208 is 802921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13 + ... + 508.

It is an arithmetic number, because the mean of its divisors is an integer number (15660).

2129208 is an apocalyptic number.

It is an amenable number.

129208 is a deficient number, since it is larger than the sum of its proper divisors (121352).

129208 is a wasteful number, since it uses less digits than its factorization.

129208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 129208 is about 359.4551432377. The cubic root of 129208 is about 50.5548859192.

The spelling of 129208 in words is "one hundred twenty-nine thousand, two hundred eight".

Divisors: 1 2 4 8 31 62 124 248 521 1042 2084 4168 16151 32302 64604 129208