1222506405 has 32 divisors (see below), whose sum is σ = 2187225600. Its totient is φ = 647839296.

The previous prime is 1222506401. The next prime is 1222506407. The reversal of 1222506405 is 5046052221.

1222506405 is a `hidden beast` number, since 1 + 2 + 2 + 250 + 6 + 405 = 666.

It is not a de Polignac number, because 1222506405 - 2² = 1222506401 is a prime.

It is a super-3 number, since 3×1222506405³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222506401) 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 in 31 ways as a sum of consecutive naturals, for example, 7645 + ... + 50034.

It is an arithmetic number, because the mean of its divisors is an integer number (68350800).

Almost surely, 2^1222506405 is an apocalyptic number.

1222506405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1222506405 is a deficient number, since it is larger than the sum of its proper divisors (964719195).

1222506405 is a wasteful number, since it uses less digits than its factorization.

1222506405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57850 (or 57844 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1222506405 is about 34964.3590674847. The cubic root of 1222506405 is about 1069.2609695784.

Adding to 1222506405 its reverse (5046052221), we get a palindrome (6268558626).

The spelling of 1222506405 in words is "one billion, two hundred twenty-two million, five hundred six thousand, four hundred five".