Search a number
-
+
64129 = 134933
BaseRepresentation
bin1111101010000001
310020222011
433222001
54023004
61212521
7354652
oct175201
9106864
1064129
11441aa
1231141
1323260
1419529
1514004
hexfa81

64129 has 4 divisors (see below), whose sum is σ = 69076. Its totient is φ = 59184.

The previous prime is 64123. The next prime is 64151. The reversal of 64129 is 92146.

64129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92146 = 246073.

It can be written as a sum of positive squares in 2 ways, for example, as 14400 + 49729 = 120^2 + 223^2 .

It is a cyclic number.

It is not a de Polignac number, because 64129 - 29 = 63617 is a prime.

It is a super-2 number, since 2×641292 = 8225057282, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (64123) 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, 2454 + ... + 2479.

It is an arithmetic number, because the mean of its divisors is an integer number (17269).

264129 is an apocalyptic number.

It is an amenable number.

64129 is a deficient number, since it is larger than the sum of its proper divisors (4947).

64129 is a wasteful number, since it uses less digits than its factorization.

64129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4946.

The product of its digits is 432, while the sum is 22.

The square root of 64129 is about 253.2370431039. The cubic root of 64129 is about 40.0268569636.

It can be divided in two parts, 64 and 129, that multiplied together give a triangular number (8256 = T128).

The spelling of 64129 in words is "sixty-four thousand, one hundred twenty-nine".

Divisors: 1 13 4933 64129