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BaseRepresentation
bin10011011001
31200222
4103121
514431
65425
73422
oct2331
91628
101241
11a29
12875
13746
14649
1557b
hex4d9

1241 has 4 divisors (see below), whose sum is σ = 1332. Its totient is φ = 1152.

The previous prime is 1237. The next prime is 1249. The reversal of 1241 is 1421.

Adding to 1241 its reverse (1421), we get a palindrome (2662).

It can be divided in two parts, 124 and 1, that added together give a cube (125 = 53).

1241 = 83 + 93.

1241 is nontrivially palindromic in base 2.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 841 + 400 = 29^2 + 20^2 .

It is a cyclic number.

It is not a de Polignac number, because 1241 - 22 = 1237 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20 + ... + 53.

It is an arithmetic number, because the mean of its divisors is an integer number (333).

21241 is an apocalyptic number.

It is an amenable number.

1241 is a deficient number, since it is larger than the sum of its proper divisors (91).

1241 is an equidigital number, since it uses as much as digits as its factorization.

1241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90.

The product of its digits is 8, while the sum is 8.

The square root of 1241 is about 35.2278299076. The cubic root of 1241 is about 10.7462579368.

The spelling of 1241 in words is "one thousand, two hundred forty-one", and thus it is an iban number.

Divisors: 1 17 73 1241