1205056427 has 2 divisors, whose sum is σ = 1205056428. Its totient is φ = 1205056426.

The previous prime is 1205056337. The next prime is 1205056429. The reversal of 1205056427 is 7246505021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1205056427 - 2¹⁴ = 1205040043 is a prime.

Together with 1205056429, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1205056393 and 1205056402.

It is not a weakly prime, because it can be changed into another prime (1205056429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602528213 + 602528214.

It is an arithmetic number, because the mean of its divisors is an integer number (602528214).

Almost surely, 2^1205056427 is an apocalyptic number.

1205056427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205056427 is an equidigital number, since it uses as much as digits as its factorization.

1205056427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 1205056427 is about 34713.9226680017. The cubic root of 1205056427 is about 1064.1490486333.

The spelling of 1205056427 in words is "one billion, two hundred five million, fifty-six thousand, four hundred twenty-seven".