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BaseRepresentation
bin1111111101111001
310022201021
433331321
54043101
61222441
7361450
oct177571
9108637
1065401
1145156
1231a21
13239cb
1419b97
15145a1
hexff79

65401 has 4 divisors (see below), whose sum is σ = 74752. Its totient is φ = 56052.

The previous prime is 65393. The next prime is 65407. The reversal of 65401 is 10456.

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 65401 - 23 = 65393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4665 + ... + 4678.

It is an arithmetic number, because the mean of its divisors is an integer number (18688).

265401 is an apocalyptic number.

It is an amenable number.

65401 is a deficient number, since it is larger than the sum of its proper divisors (9351).

65401 is an equidigital number, since it uses as much as digits as its factorization.

65401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9350.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 65401 is about 255.7361921981. The cubic root of 65401 is about 40.2897707538.

Adding to 65401 its reverse (10456), we get a palindrome (75857).

Subtracting from 65401 its reverse (10456), we obtain a palindrome (54945).

The spelling of 65401 in words is "sixty-five thousand, four hundred one".

Divisors: 1 7 9343 65401