1226672161 has 8 divisors (see below), whose sum is σ = 1441125504. Its totient is φ = 1029375120.

The previous prime is 1226672159. The next prime is 1226672171. The reversal of 1226672161 is 1612766221.

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

It is a cyclic number.

It is not a de Polignac number, because 1226672161 - 2¹ = 1226672159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1226672141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4288921 + ... + 4289206.

It is an arithmetic number, because the mean of its divisors is an integer number (180140688).

Almost surely, 2^1226672161 is an apocalyptic number.

1226672161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1226672161 is a deficient number, since it is larger than the sum of its proper divisors (214453343).

1226672161 is a wasteful number, since it uses less digits than its factorization.

1226672161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8578151.

The product of its digits is 12096, while the sum is 34.

The square root of 1226672161 is about 35023.8798678844. The cubic root of 1226672161 is about 1070.4741139944.

The spelling of 1226672161 in words is "one billion, two hundred twenty-six million, six hundred seventy-two thousand, one hundred sixty-one".