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1141 = 7163
BaseRepresentation
bin10001110101
31120021
4101311
514031
65141
73220
oct2165
91507
101141
11948
127b1
1369a
145b7
15511
hex475

1141 has 4 divisors (see below), whose sum is σ = 1312. Its totient is φ = 972.

The previous prime is 1129. The next prime is 1151. The reversal of 1141 is 1411.

Adding to 1141 its reverse (1411), we get a palindrome (2552).

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1411 = 1783.

It is a 5-Lehmer number, since φ(1141) divides (1141-1)5.

It is a cyclic number.

It is not a de Polignac number, because 1141 - 25 = 1109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7), and also a Moran number because the ratio is a prime number: 163 = 1141 / (1 + 1 + 4 + 1).

It is a Duffinian number.

It is a plaindrome in base 13.

It is a nialpdrome in base 7 and base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151) 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, 75 + ... + 88.

It is an arithmetic number, because the mean of its divisors is an integer number (328).

21141 is an apocalyptic number.

1141 is the 20-th hex number.

It is an amenable number.

1141 is a deficient number, since it is larger than the sum of its proper divisors (171).

1141 is an equidigital number, since it uses as much as digits as its factorization.

1141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170.

The product of its digits is 4, while the sum is 7.

The square root of 1141 is about 33.7786915081. The cubic root of 1141 is about 10.4494928899.

The spelling of 1141 in words is "one thousand, one hundred forty-one", and thus it is an iban number.

Divisors: 1 7 163 1141