Search a number
1487 is a prime number
BaseRepresentation
bin10111001111
32001002
4113033
521422
610515
74223
oct2717
92032
101487
111132
12a3b
138a5
14783
15692
hex5cf

1487 has 2 divisors, whose sum is σ = 1488. Its totient is φ = 1486.

The previous prime is 1483. The next prime is 1489. The reversal of 1487 is 7841.

Adding to 1487 its product of digits (224), we get a triangular number (1711 = T58).

It can be divided in two parts, 14 and 87, that added together give a palindrome (101).

It is a happy number.

1487 is nontrivially palindromic in base 3.

It is a strong prime.

It is an emirp because it is prime and its reverse (7841) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1487 - 22 = 1483 is a prime.

It is a super-2 number, since 2×14872 = 4422338, which contains 22 as substring.

Together with 1489, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 1487.

It is not a weakly prime, because it can be changed into another prime (1481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 743 + 744.

It is an arithmetic number, because the mean of its divisors is an integer number (744).

21487 is an apocalyptic number.

1487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1487 is an equidigital number, since it uses as much as digits as its factorization.

1487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 224, while the sum is 20.

The square root of 1487 is about 38.5616389693. The cubic root of 1487 is about 11.4139769061.

The spelling of 1487 in words is "one thousand, four hundred eighty-seven".