1266124617 has 6 divisors (see below), whose sum is σ = 1828846682. Its totient is φ = 844083072.

The previous prime is 1266124553. The next prime is 1266124633. The reversal of 1266124617 is 7164216621.

1266124617 is a `hidden beast` number, since 1 + 26 + 6 + 12 + 4 + 617 = 666.

It can be written as a sum of positive squares in only one way, i.e., 875508921 + 390615696 = 29589^2 + 19764^2 .

It is not a de Polignac number, because 1266124617 - 2⁶ = 1266124553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266124667) 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 5 ways as a sum of consecutive naturals, for example, 70340248 + ... + 70340265.

Almost surely, 2^1266124617 is an apocalyptic number.

It is an amenable number.

1266124617 is a deficient number, since it is larger than the sum of its proper divisors (562722065).

1266124617 is a wasteful number, since it uses less digits than its factorization.

1266124617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140680519 (or 140680516 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 1266124617 is about 35582.6448848311. The cubic root of 1266124617 is about 1081.8294942949.

The spelling of 1266124617 in words is "one billion, two hundred sixty-six million, one hundred twenty-four thousand, six hundred seventeen".