1226650161 has 16 divisors (see below), whose sum is σ = 1796041728. Its totient is φ = 738498000.

The previous prime is 1226650153. The next prime is 1226650189. The reversal of 1226650161 is 1610566221.

It is not a de Polignac number, because 1226650161 - 2³ = 1226650153 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1226650141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118101 + ... + 128066.

It is an arithmetic number, because the mean of its divisors is an integer number (112252608).

Almost surely, 2^1226650161 is an apocalyptic number.

1226650161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1226650161 is a deficient number, since it is larger than the sum of its proper divisors (569391567).

1226650161 is a wasteful number, since it uses less digits than its factorization.

1226650161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246332.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1226650161 is about 35023.5657950472. The cubic root of 1226650161 is about 1070.4677144113.

The spelling of 1226650161 in words is "one billion, two hundred twenty-six million, six hundred fifty thousand, one hundred sixty-one".