1222457805 has 32 divisors (see below), whose sum is σ = 2175793920. Its totient is φ = 651216960.

The previous prime is 1222457801. The next prime is 1222457861. The reversal of 1222457805 is 5087542221.

It is a happy number.

1222457805 is a `hidden beast` number, since 122 + 2 + 457 + 80 + 5 = 666.

It is not a de Polignac number, because 1222457805 - 2² = 1222457801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1222457805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222457801) 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 in 31 ways as a sum of consecutive naturals, for example, 122224 + ... + 131846.

It is an arithmetic number, because the mean of its divisors is an integer number (67993560).

Almost surely, 2^1222457805 is an apocalyptic number.

1222457805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1222457805 is a deficient number, since it is larger than the sum of its proper divisors (953336115).

1222457805 is an equidigital number, since it uses as much as digits as its factorization.

1222457805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10578 (or 10572 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The square root of 1222457805 is about 34963.6640671426. The cubic root of 1222457805 is about 1069.2468001170.

The spelling of 1222457805 in words is "one billion, two hundred twenty-two million, four hundred fifty-seven thousand, eight hundred five".