1128427 has 2 divisors, whose sum is σ = 1128428. Its totient is φ = 1128426.
The previous prime is 1128397. The next prime is 1128433. The reversal of 1128427 is 7248211.
It is a happy number.
It is a strong prime.
It is an emirp because it is prime and its reverse (7248211) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 1128427 - 27 = 1128299 is a prime.
It is an Ulam number.
It is not a weakly prime, because it can be changed into another prime (1128497) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564213 + 564214.
It is an arithmetic number, because the mean of its divisors is an integer number (564214).
21128427 is an apocalyptic number.
1128427 is a deficient number, since it is larger than the sum of its proper divisors (1).
1128427 is an equidigital number, since it uses as much as digits as its factorization.
1128427 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 896, while the sum is 25.
The square root of 1128427 is about 1062.2744466474. The cubic root of 1128427 is about 104.1096907261.
It can be divided in two parts, 11284 and 27, that added together give a palindrome (11311).
The spelling of 1128427 in words is "one million, one hundred twenty-eight thousand, four hundred twenty-seven".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.001 sec. • engine limits •