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664201 = 2832347
BaseRepresentation
bin10100010001010001001
31020202010001
42202022021
5132223301
622123001
75434306
oct2421211
91222101
10664201
1141402a
12280461
131a3425
141340ad
15d1c01
hexa2289

664201 has 4 divisors (see below), whose sum is σ = 666832. Its totient is φ = 661572.

The previous prime is 664199. The next prime is 664211. The reversal of 664201 is 102466.

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 664201 - 21 = 664199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 891 + ... + 1456.

It is an arithmetic number, because the mean of its divisors is an integer number (166708).

2664201 is an apocalyptic number.

It is an amenable number.

664201 is a deficient number, since it is larger than the sum of its proper divisors (2631).

664201 is a wasteful number, since it uses less digits than its factorization.

664201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 664201 is about 814.9852759406. The cubic root of 664201 is about 87.2502155149.

Adding to 664201 its reverse (102466), we get a palindrome (766667).

The spelling of 664201 in words is "six hundred sixty-four thousand, two hundred one".

Divisors: 1 283 2347 664201