1227128143 has 2 divisors, whose sum is σ = 1227128144. Its totient is φ = 1227128142.

The previous prime is 1227128141. The next prime is 1227128159. The reversal of 1227128143 is 3418217221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1227128143 - 2¹ = 1227128141 is a prime.

Together with 1227128141, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1227128141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613564071 + 613564072.

It is an arithmetic number, because the mean of its divisors is an integer number (613564072).

Almost surely, 2^1227128143 is an apocalyptic number.

1227128143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1227128143 is an equidigital number, since it uses as much as digits as its factorization.

1227128143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 31.

The square root of 1227128143 is about 35030.3888502540. The cubic root of 1227128143 is about 1070.6067374380.

The spelling of 1227128143 in words is "one billion, two hundred twenty-seven million, one hundred twenty-eight thousand, one hundred forty-three".