1246221871 has 2 divisors, whose sum is σ = 1246221872. Its totient is φ = 1246221870.

The previous prime is 1246221863. The next prime is 1246221923. The reversal of 1246221871 is 1781226421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1246221871 - 2³ = 1246221863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1246222871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623110935 + 623110936.

It is an arithmetic number, because the mean of its divisors is an integer number (623110936).

Almost surely, 2^1246221871 is an apocalyptic number.

1246221871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1246221871 is an equidigital number, since it uses as much as digits as its factorization.

1246221871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 34.

The square root of 1246221871 is about 35301.8678117745. The cubic root of 1246221871 is about 1076.1309521135.

The spelling of 1246221871 in words is "one billion, two hundred forty-six million, two hundred twenty-one thousand, eight hundred seventy-one".