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65441 = 312111
BaseRepresentation
bin1111111110100001
310022202202
433332201
54043231
61222545
7361535
oct177641
9108682
1065441
1145192
1231a55
1323a2c
1419bc5
15145cb
hexffa1

65441 has 4 divisors (see below), whose sum is σ = 67584. Its totient is φ = 63300.

The previous prime is 65437. The next prime is 65447. The reversal of 65441 is 14456.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65441 - 22 = 65437 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10 and base 16.

It is not an unprimeable number, because it can be changed into a prime (65447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1025 + ... + 1086.

It is an arithmetic number, because the mean of its divisors is an integer number (16896).

265441 is an apocalyptic number.

It is an amenable number.

65441 is a deficient number, since it is larger than the sum of its proper divisors (2143).

65441 is a wasteful number, since it uses less digits than its factorization.

65441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142.

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

The square root of 65441 is about 255.8143858347. The cubic root of 65441 is about 40.2979829747.

Adding to 65441 its reverse (14456), we get a palindrome (79897).

The spelling of 65441 in words is "sixty-five thousand, four hundred forty-one".

Divisors: 1 31 2111 65441