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64145 = 512829
BaseRepresentation
bin1111101010010001
310020222202
433222101
54023040
61212545
7355004
oct175221
9106882
1064145
1144214
1231155
1323273
141953b
1514015
hexfa91

64145 has 4 divisors (see below), whose sum is σ = 76980. Its totient is φ = 51312.

The previous prime is 64123. The next prime is 64151. The reversal of 64145 is 54146.

Subtracting from 64145 its reverse (54146), we obtain a palindrome (9999).

It can be divided in two parts, 641 and 45, that added together give a palindrome (686).

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54146 = 227073.

It can be written as a sum of positive squares in 2 ways, for example, as 37249 + 26896 = 193^2 + 164^2 .

It is a cyclic number.

It is not a de Polignac number, because 64145 - 26 = 64081 is a prime.

It is a super-2 number, since 2×641452 = 8229162050, which contains 22 as substring.

It is a Curzon number.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6410 + ... + 6419.

It is an arithmetic number, because the mean of its divisors is an integer number (19245).

264145 is an apocalyptic number.

It is an amenable number.

64145 is a deficient number, since it is larger than the sum of its proper divisors (12835).

64145 is a wasteful number, since it uses less digits than its factorization.

64145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12834.

The product of its digits is 480, while the sum is 20.

The square root of 64145 is about 253.2686320885. The cubic root of 64145 is about 40.0301855484.

The spelling of 64145 in words is "sixty-four thousand, one hundred forty-five".

Divisors: 1 5 12829 64145