1201 has 2 divisors, whose sum is σ = 1202. Its totient is φ = 1200.
The previous prime is 1193. The next prime is 1213. The reversal of 1201 is 1021.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 625 + 576 = 25^2 + 24^2 .
It is an emirp because it is prime and its reverse (1021) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 1201 - 23 = 1193 is a prime.
It is a Chen prime.
1201 is a lucky number.
It is a plaindrome in base 7.
It is a nialpdrome in base 6, base 12 and base 15.
It is a zygodrome in base 3.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (1231) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600 + 601.
It is an arithmetic number, because the mean of its divisors is an integer number (601).
1201 is the 25-th centered square number and also the 16-th centered decagonal number.
It is an amenable number.
1201 is a deficient number, since it is larger than the sum of its proper divisors (1).
1201 is an equidigital number, since it uses as much as digits as its factorization.
1201 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 2, while the sum is 4.
The square root of 1201 is about 34.6554469023. The cubic root of 1201 is about 10.6295367016.
Adding to 1201 its reverse (1021), we get a palindrome (2222).
Multiplying 1201 by its reverse (1021), we get a palindrome (1226221).
It can be divided in two parts, 120 and 1, that added together give a palindrome (121).
The spelling of 1201 in words is "one thousand, two hundred one", and thus it is an iban number.
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.079 sec. • engine limits •