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128029 = 11103113
BaseRepresentation
bin11111010000011101
320111121211
4133100131
513044104
62424421
71042156
oct372035
9214554
10128029
1188210
1262111
1346375
143492d
1527e04
hex1f41d

128029 has 8 divisors (see below), whose sum is σ = 142272. Its totient is φ = 114240.

The previous prime is 128021. The next prime is 128033. The reversal of 128029 is 920821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128029 - 23 = 128021 is a prime.

It is a Duffinian number.

128029 is a lucky number.

It is a nialpdrome in base 11 and base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128021) 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, 1077 + ... + 1189.

It is an arithmetic number, because the mean of its divisors is an integer number (17784).

2128029 is an apocalyptic number.

It is an amenable number.

128029 is a deficient number, since it is larger than the sum of its proper divisors (14243).

128029 is a wasteful number, since it uses less digits than its factorization.

128029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227.

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

The square root of 128029 is about 357.8114028367. The cubic root of 128029 is about 50.4006477199.

The spelling of 128029 in words is "one hundred twenty-eight thousand, twenty-nine".

Divisors: 1 11 103 113 1133 1243 11639 128029