123215266 has 16 divisors (see below), whose sum is σ = 200828160. Its totient is φ = 56481840.

The previous prime is 123215227. The next prime is 123215321. The reversal of 123215266 is 662512321.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 51121 + ... + 53476.

It is an arithmetic number, because the mean of its divisors is an integer number (12551760).

Almost surely, 2^123215266 is an apocalyptic number.

123215266 is a deficient number, since it is larger than the sum of its proper divisors (77612894).

123215266 is a wasteful number, since it uses less digits than its factorization.

123215266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104649.

The product of its digits is 4320, while the sum is 28.

The square root of 123215266 is about 11100.2372046727. The cubic root of 123215266 is about 497.6089385437.

Adding to 123215266 its reverse (662512321), we get a palindrome (785727587).

The spelling of 123215266 in words is "one hundred twenty-three million, two hundred fifteen thousand, two hundred sixty-six".