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30129 = 311283
BaseRepresentation
bin111010110110001
31112022220
413112301
51431004
6351253
7153561
oct72661
945286
1030129
1120700
1215529
1310938
14ada1
158dd9
hex75b1

30129 has 12 divisors (see below), whose sum is σ = 44688. Its totient is φ = 18040.

The previous prime is 30119. The next prime is 30133. The reversal of 30129 is 92103.

It is not a de Polignac number, because 30129 - 24 = 30113 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 322 + ... + 404.

It is an arithmetic number, because the mean of its divisors is an integer number (3724).

230129 is an apocalyptic number.

It is an amenable number.

30129 is a deficient number, since it is larger than the sum of its proper divisors (14559).

30129 is a wasteful number, since it uses less digits than its factorization.

30129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 30129 is about 173.5770722187. The cubic root of 30129 is about 31.1167983745.

The spelling of 30129 in words is "thirty thousand, one hundred twenty-nine".

Divisors: 1 3 11 33 83 121 249 363 913 2739 10043 30129