1220575871 has 2 divisors, whose sum is σ = 1220575872. Its totient is φ = 1220575870.

The previous prime is 1220575861. The next prime is 1220575897. The reversal of 1220575871 is 1785750221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220575871 - 2²² = 1216381567 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220575801) 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, 610287935 + 610287936.

It is an arithmetic number, because the mean of its divisors is an integer number (610287936).

Almost surely, 2^1220575871 is an apocalyptic number.

1220575871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220575871 is an equidigital number, since it uses as much as digits as its factorization.

1220575871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39200, while the sum is 38.

The square root of 1220575871 is about 34936.7409899664. The cubic root of 1220575871 is about 1068.6978280974.

The spelling of 1220575871 in words is "one billion, two hundred twenty million, five hundred seventy-five thousand, eight hundred seventy-one".