1427 has 2 divisors, whose sum is σ = 1428. Its totient is φ = 1426.
The previous prime is 1423. The next prime is 1429. The reversal of 1427 is 7241.
It is a happy number.
1427 is an esthetic number in base 12, because in such base its adjacent digits differ by 1.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 1427 - 22 = 1423 is a prime.
Together with 1429, it forms a pair of twin primes.
It is a Chen prime.
It is a plaindrome in base 12.
It is a nialpdrome in base 15.
It is not a weakly prime, because it can be changed into another prime (1423) by changing a digit.
It is a good prime.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 713 + 714.
It is an arithmetic number, because the mean of its divisors is an integer number (714).
1427 is a deficient number, since it is larger than the sum of its proper divisors (1).
1427 is an equidigital number, since it uses as much as digits as its factorization.
1427 is an evil number, because the sum of its binary digits is even.
The product of its digits is 56, while the sum is 14.
The square root of 1427 is about 37.7756535350. The cubic root of 1427 is about 11.2583477138.
Adding to 1427 its sum of digits (14), we get a palindrome (1441).
Adding to 1427 its reverse (7241), we get a palindrome (8668).
It can be divided in two parts, 14 and 27, that multiplied together give a triangular number (378 = T27).
The spelling of 1427 in words is "one thousand, four hundred twenty-seven", and thus it is an iban number.
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.090 sec. • engine limits •