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129894 = 2321649
BaseRepresentation
bin11111101101100110
320121011220
4133231212
513124034
62441210
71050462
oct375546
9217156
10129894
1189656
1263206
134717b
14354a2
1528749
hex1fb66

129894 has 8 divisors (see below), whose sum is σ = 259800. Its totient is φ = 43296.

The previous prime is 129893. The next prime is 129901. The reversal of 129894 is 498921.

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

129894 is an admirable number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129893) 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, 10819 + ... + 10830.

It is an arithmetic number, because the mean of its divisors is an integer number (32475).

2129894 is an apocalyptic number.

129894 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

129894 is a wasteful number, since it uses less digits than its factorization.

129894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21654.

The product of its digits is 5184, while the sum is 33.

The square root of 129894 is about 360.4081020177. The cubic root of 129894 is about 50.6441978706.

The spelling of 129894 in words is "one hundred twenty-nine thousand, eight hundred ninety-four".

Divisors: 1 2 3 6 21649 43298 64947 129894