1261226226 has 32 divisors (see below), whose sum is σ = 2876283648. Its totient is φ = 365241600.

The previous prime is 1261226221. The next prime is 1261226233. The reversal of 1261226226 is 6226221621.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1261226193 and 1261226202.

It is not an unprimeable number, because it can be changed into a prime (1261226221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 474250 + ... + 476901.

It is an arithmetic number, because the mean of its divisors is an integer number (89883864).

Almost surely, 2^1261226226 is an apocalyptic number.

1261226226 is an abundant number, since it is smaller than the sum of its proper divisors (1615057422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1261226226 is a wasteful number, since it uses less digits than its factorization.

1261226226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951186.

The product of its digits is 6912, while the sum is 30.

The square root of 1261226226 is about 35513.7470002815. The cubic root of 1261226226 is about 1080.4325616381.

Adding to 1261226226 its reverse (6226221621), we get a palindrome (7487447847).

The spelling of 1261226226 in words is "one billion, two hundred sixty-one million, two hundred twenty-six thousand, two hundred twenty-six".