1223720126 has 8 divisors (see below), whose sum is σ = 1837542000. Its totient is φ = 611206128.

The previous prime is 1223720119. The next prime is 1223720131. The reversal of 1223720126 is 6210273221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1223720095 and 1223720104.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 324626 + ... + 328373.

It is an arithmetic number, because the mean of its divisors is an integer number (229692750).

Almost surely, 2^1223720126 is an apocalyptic number.

1223720126 is a deficient number, since it is larger than the sum of its proper divisors (613821874).

1223720126 is an equidigital number, since it uses as much as digits as its factorization.

1223720126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653938.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 1223720126 is about 34981.7113074818. The cubic root of 1223720126 is about 1069.6147114862.

Adding to 1223720126 its reverse (6210273221), we get a palindrome (7433993347).

The spelling of 1223720126 in words is "one billion, two hundred twenty-three million, seven hundred twenty thousand, one hundred twenty-six".