1266606243 has 72 divisors (see below), whose sum is σ = 2216455488. Its totient is φ = 694407168.

The previous prime is 1266606241. The next prime is 1266606331. The reversal of 1266606243 is 3426066621.

It is not a de Polignac number, because 1266606243 - 2¹ = 1266606241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1266606198 and 1266606207.

It is not an unprimeable number, because it can be changed into a prime (1266606241) 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 71 ways as a sum of consecutive naturals, for example, 1097955 + ... + 1099107.

It is an arithmetic number, because the mean of its divisors is an integer number (30784104).

Almost surely, 2^1266606243 is an apocalyptic number.

1266606243 is a deficient number, since it is larger than the sum of its proper divisors (949849245).

1266606243 is a wasteful number, since it uses less digits than its factorization.

1266606243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273 (or 1263 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 1266606243 is about 35589.4119507474. The cubic root of 1266606243 is about 1081.9666506623.

The spelling of 1266606243 in words is "one billion, two hundred sixty-six million, six hundred six thousand, two hundred forty-three".