Search a number
-
+
129710 = 25717109
BaseRepresentation
bin11111101010101110
320120221002
4133222232
513122320
62440302
71050110
oct375256
9216832
10129710
11894a9
1263092
1347069
14353b0
1528675
hex1faae

129710 has 32 divisors (see below), whose sum is σ = 285120. Its totient is φ = 41472.

The previous prime is 129707. The next prime is 129719. The reversal of 129710 is 17921.

129710 = T7 + T8 + ... + T91.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1136 + ... + 1244.

It is an arithmetic number, because the mean of its divisors is an integer number (8910).

2129710 is an apocalyptic number.

129710 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129710 is an abundant number, since it is smaller than the sum of its proper divisors (155410).

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

129710 is a wasteful number, since it uses less digits than its factorization.

129710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 129710 is about 360.1527453734. The cubic root of 129710 is about 50.6202733991.

The spelling of 129710 in words is "one hundred twenty-nine thousand, seven hundred ten".

Divisors: 1 2 5 7 10 14 17 34 35 70 85 109 119 170 218 238 545 595 763 1090 1190 1526 1853 3706 3815 7630 9265 12971 18530 25942 64855 129710