1226415866 has 16 divisors (see below), whose sum is σ = 2018515464. Its totient is φ = 555357504.

The previous prime is 1226415863. The next prime is 1226415877. The reversal of 1226415866 is 6685146221.

1226415866 = 2726² + 2727² + ... + 2881².

It can be written as a sum of positive squares in 4 ways, for example, as 1050084025 + 176331841 = 32405^2 + 13279^2 .

It is not an unprimeable number, because it can be changed into a prime (1226415863) 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 7 ways as a sum of consecutive naturals, for example, 443621 + ... + 446376.

Almost surely, 2^1226415866 is an apocalyptic number.

1226415866 is a deficient number, since it is larger than the sum of its proper divisors (792099598).

1226415866 is a wasteful number, since it uses less digits than its factorization.

1226415866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890065.

The product of its digits is 138240, while the sum is 41.

The square root of 1226415866 is about 35020.2208159800. The cubic root of 1226415866 is about 1070.3995555585.

The spelling of 1226415866 in words is "one billion, two hundred twenty-six million, four hundred fifteen thousand, eight hundred sixty-six".