1205222423 has 6 divisors (see below), whose sum is σ = 1238677776. Its totient is φ = 1172647512.

The previous prime is 1205222419. The next prime is 1205222437. The reversal of 1205222423 is 3242225021.

It is not a de Polignac number, because 1205222423 - 2² = 1205222419 is a prime.

It is a super-2 number, since 2×1205222423² = 2905122177803981858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205222023) 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 5 ways as a sum of consecutive naturals, for example, 438815 + ... + 441552.

It is an arithmetic number, because the mean of its divisors is an integer number (206446296).

Almost surely, 2^1205222423 is an apocalyptic number.

1205222423 is a deficient number, since it is larger than the sum of its proper divisors (33455353).

1205222423 is an frugal number, since it uses more digits than its factorization.

1205222423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880441 (or 880404 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 1205222423 is about 34716.3134995639. The cubic root of 1205222423 is about 1064.1979084132.

Adding to 1205222423 its reverse (3242225021), we get a palindrome (4447447444).

The spelling of 1205222423 in words is "one billion, two hundred five million, two hundred twenty-two thousand, four hundred twenty-three".